./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c36dfa3b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_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 e401a4e4197b43467958a92870f8195ba22195c146137fa78352c627ea2eeb40 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-c36dfa3 [2021-11-03 22:17:35,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 22:17:35,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 22:17:35,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 22:17:35,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 22:17:35,698 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 22:17:35,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 22:17:35,701 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 22:17:35,702 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 22:17:35,705 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 22:17:35,706 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 22:17:35,707 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 22:17:35,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 22:17:35,709 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 22:17:35,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 22:17:35,713 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 22:17:35,714 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 22:17:35,715 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 22:17:35,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 22:17:35,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 22:17:35,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 22:17:35,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 22:17:35,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 22:17:35,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 22:17:35,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 22:17:35,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 22:17:35,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 22:17:35,729 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 22:17:35,730 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 22:17:35,730 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 22:17:35,731 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 22:17:35,732 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 22:17:35,733 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 22:17:35,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 22:17:35,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 22:17:35,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 22:17:35,735 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 22:17:35,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 22:17:35,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 22:17:35,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 22:17:35,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 22:17:35,738 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-03 22:17:35,763 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 22:17:35,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 22:17:35,764 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-03 22:17:35,764 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-03 22:17:35,765 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 22:17:35,765 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 22:17:35,765 INFO L138 SettingsManager]: * Use SBE=true [2021-11-03 22:17:35,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 22:17:35,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 22:17:35,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 22:17:35,766 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 22:17:35,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 22:17:35,766 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 22:17:35,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 22:17:35,767 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 22:17:35,767 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 22:17:35,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 22:17:35,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 22:17:35,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 22:17:35,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 22:17:35,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 22:17:35,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 22:17:35,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 22:17:35,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-03 22:17:35,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 22:17:35,768 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-03 22:17:35,768 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-03 22:17:35,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 22:17:35,770 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 22:17:35,770 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e401a4e4197b43467958a92870f8195ba22195c146137fa78352c627ea2eeb40 [2021-11-03 22:17:35,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 22:17:35,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 22:17:35,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 22:17:35,969 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 22:17:35,983 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 22:17:35,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i [2021-11-03 22:17:36,022 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49eb636e8/1cd475e0b57d4926a48fbb82a977a112/FLAG529a79721 [2021-11-03 22:17:36,631 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 22:17:36,633 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i [2021-11-03 22:17:36,666 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49eb636e8/1cd475e0b57d4926a48fbb82a977a112/FLAG529a79721 [2021-11-03 22:17:37,005 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49eb636e8/1cd475e0b57d4926a48fbb82a977a112 [2021-11-03 22:17:37,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 22:17:37,008 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 22:17:37,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 22:17:37,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 22:17:37,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 22:17:37,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 10:17:37" (1/1) ... [2021-11-03 22:17:37,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43b968ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:17:37, skipping insertion in model container [2021-11-03 22:17:37,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 10:17:37" (1/1) ... [2021-11-03 22:17:37,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 22:17:37,128 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 22:17:37,365 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i[4502,4515] [2021-11-03 22:17:37,372 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i[4562,4575] [2021-11-03 22:17:37,394 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 22:17:37,399 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 22:17:37,962 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:17:37,969 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:17:37,970 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:17:37,970 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:17:37,971 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:17:37,978 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:17:37,979 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:17:37,980 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:17:37,981 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:17:38,211 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 22:17:38,212 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 22:17:38,213 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 22:17:38,214 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 22:17:38,214 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 22:17:38,218 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 22:17:38,219 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 22:17:38,219 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 22:17:38,220 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 22:17:38,220 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 22:17:38,302 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 22:17:38,370 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:17:38,375 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:17:38,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 22:17:38,475 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 22:17:38,493 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i[4502,4515] [2021-11-03 22:17:38,495 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i[4562,4575] [2021-11-03 22:17:38,500 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 22:17:38,501 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 22:17:38,526 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:17:38,526 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:17:38,526 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:17:38,527 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:17:38,527 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:17:38,531 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:17:38,531 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:17:38,532 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:17:38,532 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:17:38,552 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 22:17:38,552 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 22:17:38,557 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 22:17:38,559 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 22:17:38,560 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 22:17:38,560 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 22:17:38,561 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 22:17:38,561 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 22:17:38,562 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 22:17:38,562 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 22:17:38,587 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 22:17:38,619 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:17:38,625 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:17:38,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 22:17:38,786 INFO L208 MainTranslator]: Completed translation [2021-11-03 22:17:38,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:17:38 WrapperNode [2021-11-03 22:17:38,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 22:17:38,788 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 22:17:38,788 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 22:17:38,788 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 22:17:38,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:17:38" (1/1) ... [2021-11-03 22:17:38,890 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:17:38" (1/1) ... [2021-11-03 22:17:38,976 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 22:17:38,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 22:17:38,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 22:17:38,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 22:17:38,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:17:38" (1/1) ... [2021-11-03 22:17:38,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:17:38" (1/1) ... [2021-11-03 22:17:38,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:17:38" (1/1) ... [2021-11-03 22:17:38,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:17:38" (1/1) ... [2021-11-03 22:17:39,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:17:38" (1/1) ... [2021-11-03 22:17:39,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:17:38" (1/1) ... [2021-11-03 22:17:39,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:17:38" (1/1) ... [2021-11-03 22:17:39,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 22:17:39,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 22:17:39,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 22:17:39,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 22:17:39,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:17:38" (1/1) ... [2021-11-03 22:17:39,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 22:17:39,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 22:17:39,129 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) [2021-11-03 22:17:39,146 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 [2021-11-03 22:17:39,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 22:17:39,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-03 22:17:39,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 22:17:39,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 22:17:39,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 22:17:39,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 22:17:39,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 22:17:39,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 22:17:39,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 22:17:39,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-03 22:17:39,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 22:17:43,656 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 22:17:43,656 INFO L299 CfgBuilder]: Removed 73 assume(true) statements. [2021-11-03 22:17:43,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 10:17:43 BoogieIcfgContainer [2021-11-03 22:17:43,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 22:17:43,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 22:17:43,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 22:17:43,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 22:17:43,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 10:17:37" (1/3) ... [2021-11-03 22:17:43,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50894042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 10:17:43, skipping insertion in model container [2021-11-03 22:17:43,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:17:38" (2/3) ... [2021-11-03 22:17:43,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50894042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 10:17:43, skipping insertion in model container [2021-11-03 22:17:43,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 10:17:43" (3/3) ... [2021-11-03 22:17:43,668 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_clean_up_secure_harness.i [2021-11-03 22:17:43,672 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 22:17:43,673 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-03 22:17:43,711 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 22:17:43,715 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 [2021-11-03 22:17:43,716 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-03 22:17:43,737 INFO L276 IsEmpty]: Start isEmpty. Operand has 161 states, 154 states have (on average 1.4610389610389611) internal successors, (225), 160 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:17:43,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 22:17:43,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:17:43,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:17:43,746 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:17:43,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:17:43,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1283718026, now seen corresponding path program 1 times [2021-11-03 22:17:43,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:17:43,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590921] [2021-11-03 22:17:43,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:17:43,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:17:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:17:44,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:17:44,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:17:44,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590921] [2021-11-03 22:17:44,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590921] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:17:44,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:17:44,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 22:17:44,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914176939] [2021-11-03 22:17:44,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:17:44,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 22:17:44,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:17:44,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 22:17:44,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 22:17:44,352 INFO L87 Difference]: Start difference. First operand has 161 states, 154 states have (on average 1.4610389610389611) internal successors, (225), 160 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:17:46,439 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:17:47,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:17:47,597 INFO L93 Difference]: Finished difference Result 318 states and 445 transitions. [2021-11-03 22:17:47,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 22:17:47,600 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-03 22:17:47,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:17:47,605 INFO L225 Difference]: With dead ends: 318 [2021-11-03 22:17:47,605 INFO L226 Difference]: Without dead ends: 156 [2021-11-03 22:17:47,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 22:17:47,618 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2882.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.71ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3179.24ms IncrementalHoareTripleChecker+Time [2021-11-03 22:17:47,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 209 Unknown, 0 Unchecked, 3.71ms Time], IncrementalHoareTripleChecker [0 Valid, 208 Invalid, 1 Unknown, 0 Unchecked, 3179.24ms Time] [2021-11-03 22:17:47,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-03 22:17:47,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2021-11-03 22:17:47,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 150 states have (on average 1.36) internal successors, (204), 155 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:17:47,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 204 transitions. [2021-11-03 22:17:47,664 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 204 transitions. Word has length 34 [2021-11-03 22:17:47,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:17:47,664 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 204 transitions. [2021-11-03 22:17:47,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:17:47,665 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 204 transitions. [2021-11-03 22:17:47,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 22:17:47,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:17:47,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:17:47,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 22:17:47,666 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:17:47,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:17:47,667 INFO L85 PathProgramCache]: Analyzing trace with hash 27354892, now seen corresponding path program 1 times [2021-11-03 22:17:47,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:17:47,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476331050] [2021-11-03 22:17:47,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:17:47,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:17:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:17:47,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:17:47,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:17:47,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476331050] [2021-11-03 22:17:47,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476331050] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:17:47,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:17:47,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 22:17:47,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473064232] [2021-11-03 22:17:47,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:17:47,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 22:17:47,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:17:47,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 22:17:47,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 22:17:47,936 INFO L87 Difference]: Start difference. First operand 156 states and 204 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:17:49,985 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:17:51,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:17:51,316 INFO L93 Difference]: Finished difference Result 286 states and 374 transitions. [2021-11-03 22:17:51,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 22:17:51,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-03 22:17:51,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:17:51,318 INFO L225 Difference]: With dead ends: 286 [2021-11-03 22:17:51,318 INFO L226 Difference]: Without dead ends: 156 [2021-11-03 22:17:51,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.80ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 22:17:51,320 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 295 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3021.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.65ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3328.77ms IncrementalHoareTripleChecker+Time [2021-11-03 22:17:51,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 0 Invalid, 299 Unknown, 0 Unchecked, 10.65ms Time], IncrementalHoareTripleChecker [6 Valid, 292 Invalid, 1 Unknown, 0 Unchecked, 3328.77ms Time] [2021-11-03 22:17:51,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-03 22:17:51,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2021-11-03 22:17:51,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 150 states have (on average 1.3466666666666667) internal successors, (202), 155 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:17:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 202 transitions. [2021-11-03 22:17:51,327 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 202 transitions. Word has length 34 [2021-11-03 22:17:51,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:17:51,327 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 202 transitions. [2021-11-03 22:17:51,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:17:51,328 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 202 transitions. [2021-11-03 22:17:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-03 22:17:51,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:17:51,329 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:17:51,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 22:17:51,329 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:17:51,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:17:51,330 INFO L85 PathProgramCache]: Analyzing trace with hash -2136977490, now seen corresponding path program 1 times [2021-11-03 22:17:51,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:17:51,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600852583] [2021-11-03 22:17:51,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:17:51,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:17:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:17:51,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:17:51,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:17:51,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600852583] [2021-11-03 22:17:51,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600852583] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:17:51,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:17:51,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 22:17:51,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367923537] [2021-11-03 22:17:51,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:17:51,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 22:17:51,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:17:51,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 22:17:51,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 22:17:51,633 INFO L87 Difference]: Start difference. First operand 156 states and 202 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:17:53,678 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:17:55,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:17:55,692 INFO L93 Difference]: Finished difference Result 347 states and 456 transitions. [2021-11-03 22:17:55,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 22:17:55,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-03 22:17:55,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:17:55,693 INFO L225 Difference]: With dead ends: 347 [2021-11-03 22:17:55,693 INFO L226 Difference]: Without dead ends: 216 [2021-11-03 22:17:55,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.61ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 22:17:55,695 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 138 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 21 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3676.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.58ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3982.15ms IncrementalHoareTripleChecker+Time [2021-11-03 22:17:55,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 0 Invalid, 643 Unknown, 0 Unchecked, 11.58ms Time], IncrementalHoareTripleChecker [21 Valid, 621 Invalid, 1 Unknown, 0 Unchecked, 3982.15ms Time] [2021-11-03 22:17:55,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-03 22:17:55,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 168. [2021-11-03 22:17:55,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 162 states have (on average 1.3209876543209877) internal successors, (214), 167 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:17:55,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 214 transitions. [2021-11-03 22:17:55,721 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 214 transitions. Word has length 46 [2021-11-03 22:17:55,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:17:55,721 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 214 transitions. [2021-11-03 22:17:55,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:17:55,722 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 214 transitions. [2021-11-03 22:17:55,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-03 22:17:55,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:17:55,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:17:55,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 22:17:55,723 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:17:55,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:17:55,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1456389932, now seen corresponding path program 1 times [2021-11-03 22:17:55,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:17:55,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898627893] [2021-11-03 22:17:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:17:55,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:17:55,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:17:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:17:56,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:17:56,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898627893] [2021-11-03 22:17:56,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898627893] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:17:56,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:17:56,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 22:17:56,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929750920] [2021-11-03 22:17:56,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:17:56,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 22:17:56,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:17:56,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 22:17:56,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-03 22:17:56,056 INFO L87 Difference]: Start difference. First operand 168 states and 214 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:17:58,103 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:17:59,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:17:59,213 INFO L93 Difference]: Finished difference Result 270 states and 342 transitions. [2021-11-03 22:17:59,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 22:17:59,213 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-03 22:17:59,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:17:59,214 INFO L225 Difference]: With dead ends: 270 [2021-11-03 22:17:59,214 INFO L226 Difference]: Without dead ends: 168 [2021-11-03 22:17:59,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 213.78ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-03 22:17:59,216 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 643 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2796.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.09ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3028.88ms IncrementalHoareTripleChecker+Time [2021-11-03 22:17:59,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 0 Invalid, 328 Unknown, 0 Unchecked, 6.09ms Time], IncrementalHoareTripleChecker [9 Valid, 318 Invalid, 1 Unknown, 0 Unchecked, 3028.88ms Time] [2021-11-03 22:17:59,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-03 22:17:59,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-11-03 22:17:59,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 162 states have (on average 1.3024691358024691) internal successors, (211), 167 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:17:59,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 211 transitions. [2021-11-03 22:17:59,222 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 211 transitions. Word has length 46 [2021-11-03 22:17:59,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:17:59,222 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 211 transitions. [2021-11-03 22:17:59,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:17:59,222 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 211 transitions. [2021-11-03 22:17:59,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 22:17:59,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:17:59,223 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:17:59,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 22:17:59,224 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:17:59,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:17:59,224 INFO L85 PathProgramCache]: Analyzing trace with hash 921784791, now seen corresponding path program 1 times [2021-11-03 22:17:59,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:17:59,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357201918] [2021-11-03 22:17:59,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:17:59,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:17:59,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:17:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:17:59,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:17:59,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357201918] [2021-11-03 22:17:59,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357201918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:17:59,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:17:59,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-03 22:17:59,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244132761] [2021-11-03 22:17:59,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:17:59,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 22:17:59,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:17:59,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 22:17:59,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-03 22:17:59,543 INFO L87 Difference]: Start difference. First operand 168 states and 211 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:01,615 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:18:02,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:18:02,889 INFO L93 Difference]: Finished difference Result 241 states and 298 transitions. [2021-11-03 22:18:02,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 22:18:02,890 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-03 22:18:02,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:18:02,891 INFO L225 Difference]: With dead ends: 241 [2021-11-03 22:18:02,891 INFO L226 Difference]: Without dead ends: 168 [2021-11-03 22:18:02,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 285.02ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-11-03 22:18:02,892 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 767 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2919.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.90ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3148.90ms IncrementalHoareTripleChecker+Time [2021-11-03 22:18:02,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [767 Valid, 0 Invalid, 381 Unknown, 0 Unchecked, 6.90ms Time], IncrementalHoareTripleChecker [7 Valid, 373 Invalid, 1 Unknown, 0 Unchecked, 3148.90ms Time] [2021-11-03 22:18:02,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-03 22:18:02,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-11-03 22:18:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 162 states have (on average 1.2962962962962963) internal successors, (210), 167 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:02,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 210 transitions. [2021-11-03 22:18:02,905 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 210 transitions. Word has length 52 [2021-11-03 22:18:02,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:18:02,906 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 210 transitions. [2021-11-03 22:18:02,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:02,906 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 210 transitions. [2021-11-03 22:18:02,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 22:18:02,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:18:02,907 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:18:02,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 22:18:02,908 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:18:02,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:18:02,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1091747988, now seen corresponding path program 1 times [2021-11-03 22:18:02,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:18:02,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564868495] [2021-11-03 22:18:02,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:18:02,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:18:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:18:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:18:03,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:18:03,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564868495] [2021-11-03 22:18:03,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564868495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:18:03,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:18:03,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 22:18:03,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030359437] [2021-11-03 22:18:03,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:18:03,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 22:18:03,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:18:03,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 22:18:03,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 22:18:03,401 INFO L87 Difference]: Start difference. First operand 168 states and 210 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:05,444 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:18:08,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:18:08,489 INFO L93 Difference]: Finished difference Result 303 states and 368 transitions. [2021-11-03 22:18:08,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 22:18:08,489 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-03 22:18:08,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:18:08,490 INFO L225 Difference]: With dead ends: 303 [2021-11-03 22:18:08,490 INFO L226 Difference]: Without dead ends: 299 [2021-11-03 22:18:08,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 245.44ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-03 22:18:08,491 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 283 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4548.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.50ms SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4889.11ms IncrementalHoareTripleChecker+Time [2021-11-03 22:18:08,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 0 Invalid, 917 Unknown, 0 Unchecked, 11.50ms Time], IncrementalHoareTripleChecker [45 Valid, 871 Invalid, 1 Unknown, 0 Unchecked, 4889.11ms Time] [2021-11-03 22:18:08,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-03 22:18:08,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 176. [2021-11-03 22:18:08,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 170 states have (on average 1.2823529411764707) internal successors, (218), 175 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:08,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 218 transitions. [2021-11-03 22:18:08,497 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 218 transitions. Word has length 58 [2021-11-03 22:18:08,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:18:08,498 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 218 transitions. [2021-11-03 22:18:08,498 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:08,498 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 218 transitions. [2021-11-03 22:18:08,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-03 22:18:08,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:18:08,499 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:18:08,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 22:18:08,499 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:18:08,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:18:08,500 INFO L85 PathProgramCache]: Analyzing trace with hash 948784038, now seen corresponding path program 1 times [2021-11-03 22:18:08,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:18:08,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428574592] [2021-11-03 22:18:08,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:18:08,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:18:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:18:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:18:10,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:18:10,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428574592] [2021-11-03 22:18:10,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428574592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:18:10,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:18:10,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-03 22:18:10,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572868133] [2021-11-03 22:18:10,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:18:10,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-03 22:18:10,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:18:10,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-03 22:18:10,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-03 22:18:10,544 INFO L87 Difference]: Start difference. First operand 176 states and 218 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:12,591 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:18:15,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:18:15,829 INFO L93 Difference]: Finished difference Result 363 states and 453 transitions. [2021-11-03 22:18:15,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-03 22:18:15,830 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-03 22:18:15,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:18:15,831 INFO L225 Difference]: With dead ends: 363 [2021-11-03 22:18:15,831 INFO L226 Difference]: Without dead ends: 214 [2021-11-03 22:18:15,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 837.22ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-11-03 22:18:15,832 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 653 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4371.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.66ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4611.79ms IncrementalHoareTripleChecker+Time [2021-11-03 22:18:15,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 0 Invalid, 930 Unknown, 0 Unchecked, 13.66ms Time], IncrementalHoareTripleChecker [25 Valid, 904 Invalid, 1 Unknown, 0 Unchecked, 4611.79ms Time] [2021-11-03 22:18:15,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-03 22:18:15,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 172. [2021-11-03 22:18:15,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 166 states have (on average 1.2771084337349397) internal successors, (212), 171 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:15,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 212 transitions. [2021-11-03 22:18:15,841 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 212 transitions. Word has length 62 [2021-11-03 22:18:15,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:18:15,842 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 212 transitions. [2021-11-03 22:18:15,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:15,842 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 212 transitions. [2021-11-03 22:18:15,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 22:18:15,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:18:15,843 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:18:15,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 22:18:15,843 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:18:15,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:18:15,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1716080936, now seen corresponding path program 1 times [2021-11-03 22:18:15,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:18:15,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785065999] [2021-11-03 22:18:15,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:18:15,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:18:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:18:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:18:16,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:18:16,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785065999] [2021-11-03 22:18:16,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785065999] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:18:16,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:18:16,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 22:18:16,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865006700] [2021-11-03 22:18:16,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:18:16,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 22:18:16,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:18:16,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 22:18:16,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 22:18:16,064 INFO L87 Difference]: Start difference. First operand 172 states and 212 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:18,107 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:18:20,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:18:20,554 INFO L93 Difference]: Finished difference Result 515 states and 636 transitions. [2021-11-03 22:18:20,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 22:18:20,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-03 22:18:20,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:18:20,556 INFO L225 Difference]: With dead ends: 515 [2021-11-03 22:18:20,556 INFO L226 Difference]: Without dead ends: 363 [2021-11-03 22:18:20,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 118.04ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-03 22:18:20,557 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 366 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4066.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.26ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4368.08ms IncrementalHoareTripleChecker+Time [2021-11-03 22:18:20,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 0 Invalid, 742 Unknown, 0 Unchecked, 8.26ms Time], IncrementalHoareTripleChecker [27 Valid, 714 Invalid, 1 Unknown, 0 Unchecked, 4368.08ms Time] [2021-11-03 22:18:20,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-11-03 22:18:20,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 210. [2021-11-03 22:18:20,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 204 states have (on average 1.2745098039215685) internal successors, (260), 209 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:20,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 260 transitions. [2021-11-03 22:18:20,564 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 260 transitions. Word has length 70 [2021-11-03 22:18:20,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:18:20,564 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 260 transitions. [2021-11-03 22:18:20,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:20,564 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 260 transitions. [2021-11-03 22:18:20,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 22:18:20,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:18:20,565 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:18:20,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 22:18:20,566 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:18:20,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:18:20,566 INFO L85 PathProgramCache]: Analyzing trace with hash -381014808, now seen corresponding path program 1 times [2021-11-03 22:18:20,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:18:20,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096486009] [2021-11-03 22:18:20,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:18:20,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:18:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:18:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:18:21,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:18:21,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096486009] [2021-11-03 22:18:21,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096486009] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:18:21,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:18:21,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-03 22:18:21,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222359429] [2021-11-03 22:18:21,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:18:21,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 22:18:21,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:18:21,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 22:18:21,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-03 22:18:21,161 INFO L87 Difference]: Start difference. First operand 210 states and 260 transitions. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:23,206 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:18:28,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:18:28,593 INFO L93 Difference]: Finished difference Result 557 states and 693 transitions. [2021-11-03 22:18:28,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-03 22:18:28,594 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-03 22:18:28,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:18:28,597 INFO L225 Difference]: With dead ends: 557 [2021-11-03 22:18:28,597 INFO L226 Difference]: Without dead ends: 369 [2021-11-03 22:18:28,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 805.17ms TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-11-03 22:18:28,598 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 554 mSDsluCounter, 1248 mSDsCounter, 0 mSdLazyCounter, 2207 mSolverCounterSat, 49 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6518.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.16ms SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6870.93ms IncrementalHoareTripleChecker+Time [2021-11-03 22:18:28,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 0 Invalid, 2257 Unknown, 0 Unchecked, 14.16ms Time], IncrementalHoareTripleChecker [49 Valid, 2207 Invalid, 1 Unknown, 0 Unchecked, 6870.93ms Time] [2021-11-03 22:18:28,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-11-03 22:18:28,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 219. [2021-11-03 22:18:28,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 213 states have (on average 1.2300469483568075) internal successors, (262), 218 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:28,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 262 transitions. [2021-11-03 22:18:28,609 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 262 transitions. Word has length 70 [2021-11-03 22:18:28,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:18:28,609 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 262 transitions. [2021-11-03 22:18:28,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:28,609 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 262 transitions. [2021-11-03 22:18:28,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 22:18:28,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:18:28,610 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:18:28,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 22:18:28,610 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:18:28,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:18:28,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1752822106, now seen corresponding path program 1 times [2021-11-03 22:18:28,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:18:28,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080139611] [2021-11-03 22:18:28,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:18:28,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:18:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:18:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:18:29,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:18:29,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080139611] [2021-11-03 22:18:29,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080139611] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:18:29,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:18:29,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-03 22:18:29,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243905097] [2021-11-03 22:18:29,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:18:29,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-03 22:18:29,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:18:29,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-03 22:18:29,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-03 22:18:29,200 INFO L87 Difference]: Start difference. First operand 219 states and 262 transitions. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:31,241 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:18:40,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:18:40,809 INFO L93 Difference]: Finished difference Result 537 states and 652 transitions. [2021-11-03 22:18:40,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-03 22:18:40,809 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-03 22:18:40,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:18:40,815 INFO L225 Difference]: With dead ends: 537 [2021-11-03 22:18:40,815 INFO L226 Difference]: Without dead ends: 403 [2021-11-03 22:18:40,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 991.40ms TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2021-11-03 22:18:40,816 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 495 mSDsluCounter, 1905 mSDsCounter, 0 mSdLazyCounter, 3136 mSolverCounterSat, 34 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10252.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.11ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 3136 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10787.26ms IncrementalHoareTripleChecker+Time [2021-11-03 22:18:40,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 0 Invalid, 3171 Unknown, 0 Unchecked, 27.11ms Time], IncrementalHoareTripleChecker [34 Valid, 3136 Invalid, 1 Unknown, 0 Unchecked, 10787.26ms Time] [2021-11-03 22:18:40,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-11-03 22:18:40,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 241. [2021-11-03 22:18:40,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 235 states have (on average 1.225531914893617) internal successors, (288), 240 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 288 transitions. [2021-11-03 22:18:40,823 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 288 transitions. Word has length 70 [2021-11-03 22:18:40,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:18:40,823 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 288 transitions. [2021-11-03 22:18:40,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:40,824 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 288 transitions. [2021-11-03 22:18:40,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 22:18:40,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:18:40,824 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:18:40,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 22:18:40,825 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:18:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:18:40,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1767800218, now seen corresponding path program 1 times [2021-11-03 22:18:40,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:18:40,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036316813] [2021-11-03 22:18:40,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:18:40,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:18:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:18:41,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:18:41,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:18:41,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036316813] [2021-11-03 22:18:41,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036316813] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:18:41,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:18:41,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 22:18:41,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234579177] [2021-11-03 22:18:41,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:18:41,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 22:18:41,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:18:41,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 22:18:41,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-03 22:18:41,266 INFO L87 Difference]: Start difference. First operand 241 states and 288 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:43,553 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:18:47,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:18:47,518 INFO L93 Difference]: Finished difference Result 499 states and 584 transitions. [2021-11-03 22:18:47,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 22:18:47,518 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-03 22:18:47,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:18:47,519 INFO L225 Difference]: With dead ends: 499 [2021-11-03 22:18:47,519 INFO L226 Difference]: Without dead ends: 274 [2021-11-03 22:18:47,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 244.35ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-03 22:18:47,520 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 38 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5694.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.27ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6066.65ms IncrementalHoareTripleChecker+Time [2021-11-03 22:18:47,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 1300 Unknown, 0 Unchecked, 9.27ms Time], IncrementalHoareTripleChecker [38 Valid, 1261 Invalid, 1 Unknown, 0 Unchecked, 6066.65ms Time] [2021-11-03 22:18:47,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-03 22:18:47,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 241. [2021-11-03 22:18:47,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 235 states have (on average 1.2) internal successors, (282), 240 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:47,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 282 transitions. [2021-11-03 22:18:47,526 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 282 transitions. Word has length 70 [2021-11-03 22:18:47,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:18:47,526 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 282 transitions. [2021-11-03 22:18:47,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:47,527 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 282 transitions. [2021-11-03 22:18:47,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 22:18:47,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:18:47,527 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:18:47,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-03 22:18:47,528 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:18:47,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:18:47,528 INFO L85 PathProgramCache]: Analyzing trace with hash 591592452, now seen corresponding path program 1 times [2021-11-03 22:18:47,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:18:47,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388255400] [2021-11-03 22:18:47,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:18:47,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:18:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:18:47,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:18:47,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:18:47,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388255400] [2021-11-03 22:18:47,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388255400] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:18:47,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:18:47,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 22:18:47,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717186106] [2021-11-03 22:18:47,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:18:47,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 22:18:47,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:18:47,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 22:18:47,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 22:18:47,714 INFO L87 Difference]: Start difference. First operand 241 states and 282 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:50,088 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.37s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:18:52,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:18:52,240 INFO L93 Difference]: Finished difference Result 440 states and 515 transitions. [2021-11-03 22:18:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 22:18:52,241 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-03 22:18:52,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:18:52,242 INFO L225 Difference]: With dead ends: 440 [2021-11-03 22:18:52,242 INFO L226 Difference]: Without dead ends: 202 [2021-11-03 22:18:52,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.29ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 22:18:52,250 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 22 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 17 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4178.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.00ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4472.84ms IncrementalHoareTripleChecker+Time [2021-11-03 22:18:52,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 0 Invalid, 593 Unknown, 0 Unchecked, 4.00ms Time], IncrementalHoareTripleChecker [17 Valid, 575 Invalid, 1 Unknown, 0 Unchecked, 4472.84ms Time] [2021-11-03 22:18:52,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-03 22:18:52,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 190. [2021-11-03 22:18:52,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 184 states have (on average 1.1630434782608696) internal successors, (214), 189 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:52,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 214 transitions. [2021-11-03 22:18:52,255 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 214 transitions. Word has length 74 [2021-11-03 22:18:52,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:18:52,255 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 214 transitions. [2021-11-03 22:18:52,255 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:52,256 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 214 transitions. [2021-11-03 22:18:52,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 22:18:52,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:18:52,256 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:18:52,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-03 22:18:52,256 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:18:52,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:18:52,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1177649340, now seen corresponding path program 1 times [2021-11-03 22:18:52,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:18:52,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134318896] [2021-11-03 22:18:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:18:52,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:18:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:18:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:18:52,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:18:52,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134318896] [2021-11-03 22:18:52,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134318896] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:18:52,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:18:52,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 22:18:52,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911873831] [2021-11-03 22:18:52,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:18:52,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 22:18:52,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:18:52,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 22:18:52,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-03 22:18:52,574 INFO L87 Difference]: Start difference. First operand 190 states and 214 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:54,661 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:18:58,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:18:58,235 INFO L93 Difference]: Finished difference Result 483 states and 545 transitions. [2021-11-03 22:18:58,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 22:18:58,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-03 22:18:58,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:18:58,236 INFO L225 Difference]: With dead ends: 483 [2021-11-03 22:18:58,236 INFO L226 Difference]: Without dead ends: 333 [2021-11-03 22:18:58,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 430.40ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-03 22:18:58,238 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 253 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5071.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.47ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5301.38ms IncrementalHoareTripleChecker+Time [2021-11-03 22:18:58,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 0 Invalid, 1091 Unknown, 0 Unchecked, 9.47ms Time], IncrementalHoareTripleChecker [24 Valid, 1066 Invalid, 1 Unknown, 0 Unchecked, 5301.38ms Time] [2021-11-03 22:18:58,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-11-03 22:18:58,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 207. [2021-11-03 22:18:58,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 201 states have (on average 1.144278606965174) internal successors, (230), 206 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:58,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 230 transitions. [2021-11-03 22:18:58,243 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 230 transitions. Word has length 74 [2021-11-03 22:18:58,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:18:58,243 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 230 transitions. [2021-11-03 22:18:58,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:18:58,243 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 230 transitions. [2021-11-03 22:18:58,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-03 22:18:58,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:18:58,244 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:18:58,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-03 22:18:58,244 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:18:58,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:18:58,245 INFO L85 PathProgramCache]: Analyzing trace with hash -783282554, now seen corresponding path program 1 times [2021-11-03 22:18:58,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:18:58,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917926095] [2021-11-03 22:18:58,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:18:58,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:18:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:19:00,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:19:00,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:19:00,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917926095] [2021-11-03 22:19:00,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917926095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:19:00,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:19:00,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-03 22:19:00,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202351693] [2021-11-03 22:19:00,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:19:00,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-03 22:19:00,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:19:00,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-03 22:19:00,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-03 22:19:00,351 INFO L87 Difference]: Start difference. First operand 207 states and 230 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:19:02,535 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:19:05,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:19:05,490 INFO L93 Difference]: Finished difference Result 340 states and 382 transitions. [2021-11-03 22:19:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 22:19:05,490 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-03 22:19:05,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:19:05,491 INFO L225 Difference]: With dead ends: 340 [2021-11-03 22:19:05,491 INFO L226 Difference]: Without dead ends: 209 [2021-11-03 22:19:05,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 576.72ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-11-03 22:19:05,492 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 316 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4647.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.19ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4836.84ms IncrementalHoareTripleChecker+Time [2021-11-03 22:19:05,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 0 Invalid, 890 Unknown, 0 Unchecked, 8.19ms Time], IncrementalHoareTripleChecker [12 Valid, 877 Invalid, 1 Unknown, 0 Unchecked, 4836.84ms Time] [2021-11-03 22:19:05,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-03 22:19:05,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 203. [2021-11-03 22:19:05,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 197 states have (on average 1.1421319796954315) internal successors, (225), 202 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:19:05,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 225 transitions. [2021-11-03 22:19:05,497 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 225 transitions. Word has length 74 [2021-11-03 22:19:05,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:19:05,497 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 225 transitions. [2021-11-03 22:19:05,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 9 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:19:05,497 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 225 transitions. [2021-11-03 22:19:05,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-03 22:19:05,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:19:05,498 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:19:05,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-03 22:19:05,498 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:19:05,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:19:05,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1580395081, now seen corresponding path program 1 times [2021-11-03 22:19:05,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:19:05,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923290825] [2021-11-03 22:19:05,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:19:05,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:19:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:19:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:19:07,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:19:07,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923290825] [2021-11-03 22:19:07,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923290825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:19:07,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:19:07,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-03 22:19:07,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918348347] [2021-11-03 22:19:07,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:19:07,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-03 22:19:07,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:19:07,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-03 22:19:07,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-03 22:19:07,598 INFO L87 Difference]: Start difference. First operand 203 states and 225 transitions. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:19:09,647 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:19:12,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:19:12,521 INFO L93 Difference]: Finished difference Result 385 states and 433 transitions. [2021-11-03 22:19:12,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 22:19:12,521 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-03 22:19:12,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:19:12,522 INFO L225 Difference]: With dead ends: 385 [2021-11-03 22:19:12,522 INFO L226 Difference]: Without dead ends: 272 [2021-11-03 22:19:12,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 513.26ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-03 22:19:12,523 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 722 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4315.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.27ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4614.24ms IncrementalHoareTripleChecker+Time [2021-11-03 22:19:12,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [722 Valid, 0 Invalid, 793 Unknown, 0 Unchecked, 9.27ms Time], IncrementalHoareTripleChecker [14 Valid, 778 Invalid, 1 Unknown, 0 Unchecked, 4614.24ms Time] [2021-11-03 22:19:12,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-11-03 22:19:12,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 203. [2021-11-03 22:19:12,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 197 states have (on average 1.1370558375634519) internal successors, (224), 202 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:19:12,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 224 transitions. [2021-11-03 22:19:12,528 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 224 transitions. Word has length 80 [2021-11-03 22:19:12,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:19:12,528 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 224 transitions. [2021-11-03 22:19:12,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:19:12,529 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 224 transitions. [2021-11-03 22:19:12,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-03 22:19:12,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:19:12,529 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:19:12,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-03 22:19:12,530 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:19:12,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:19:12,530 INFO L85 PathProgramCache]: Analyzing trace with hash 522395916, now seen corresponding path program 1 times [2021-11-03 22:19:12,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:19:12,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062083829] [2021-11-03 22:19:12,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:19:12,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:19:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:19:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:19:15,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:19:15,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062083829] [2021-11-03 22:19:15,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062083829] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:19:15,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:19:15,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-03 22:19:15,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647117355] [2021-11-03 22:19:15,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:19:15,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 22:19:15,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:19:15,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 22:19:15,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-03 22:19:15,724 INFO L87 Difference]: Start difference. First operand 203 states and 224 transitions. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:19:17,765 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:19:21,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:19:21,560 INFO L93 Difference]: Finished difference Result 433 states and 479 transitions. [2021-11-03 22:19:21,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 22:19:21,560 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-03 22:19:21,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:19:21,562 INFO L225 Difference]: With dead ends: 433 [2021-11-03 22:19:21,562 INFO L226 Difference]: Without dead ends: 332 [2021-11-03 22:19:21,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 711.11ms TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-11-03 22:19:21,563 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 588 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5094.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.48ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5422.09ms IncrementalHoareTripleChecker+Time [2021-11-03 22:19:21,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 0 Invalid, 1433 Unknown, 0 Unchecked, 9.48ms Time], IncrementalHoareTripleChecker [27 Valid, 1405 Invalid, 1 Unknown, 0 Unchecked, 5422.09ms Time] [2021-11-03 22:19:21,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-03 22:19:21,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 231. [2021-11-03 22:19:21,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 225 states have (on average 1.1377777777777778) internal successors, (256), 230 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:19:21,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 256 transitions. [2021-11-03 22:19:21,570 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 256 transitions. Word has length 86 [2021-11-03 22:19:21,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:19:21,570 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 256 transitions. [2021-11-03 22:19:21,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:19:21,571 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 256 transitions. [2021-11-03 22:19:21,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-03 22:19:21,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:19:21,571 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:19:21,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-03 22:19:21,572 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:19:21,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:19:21,573 INFO L85 PathProgramCache]: Analyzing trace with hash -230555896, now seen corresponding path program 1 times [2021-11-03 22:19:21,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:19:21,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716936011] [2021-11-03 22:19:21,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:19:21,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:19:23,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:19:23,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:19:23,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:19:23,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716936011] [2021-11-03 22:19:23,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716936011] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:19:23,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:19:23,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-03 22:19:23,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70861878] [2021-11-03 22:19:23,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:19:23,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 22:19:23,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:19:23,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 22:19:23,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-03 22:19:23,985 INFO L87 Difference]: Start difference. First operand 231 states and 256 transitions. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:19:26,028 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:19:29,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:19:29,720 INFO L93 Difference]: Finished difference Result 368 states and 407 transitions. [2021-11-03 22:19:29,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 22:19:29,721 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-03 22:19:29,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:19:29,722 INFO L225 Difference]: With dead ends: 368 [2021-11-03 22:19:29,722 INFO L226 Difference]: Without dead ends: 266 [2021-11-03 22:19:29,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 731.23ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-11-03 22:19:29,722 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 532 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4735.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.35ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5208.36ms IncrementalHoareTripleChecker+Time [2021-11-03 22:19:29,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 0 Invalid, 1278 Unknown, 0 Unchecked, 9.35ms Time], IncrementalHoareTripleChecker [15 Valid, 1262 Invalid, 1 Unknown, 0 Unchecked, 5208.36ms Time] [2021-11-03 22:19:29,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-03 22:19:29,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 231. [2021-11-03 22:19:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 225 states have (on average 1.1333333333333333) internal successors, (255), 230 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:19:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 255 transitions. [2021-11-03 22:19:29,728 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 255 transitions. Word has length 86 [2021-11-03 22:19:29,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:19:29,728 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 255 transitions. [2021-11-03 22:19:29,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:19:29,729 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 255 transitions. [2021-11-03 22:19:29,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-03 22:19:29,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:19:29,729 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:19:29,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-03 22:19:29,730 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:19:29,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:19:29,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1357387350, now seen corresponding path program 1 times [2021-11-03 22:19:29,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:19:29,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482955017] [2021-11-03 22:19:29,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:19:29,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:19:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:19:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:19:32,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:19:32,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482955017] [2021-11-03 22:19:32,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482955017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:19:32,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:19:32,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-03 22:19:32,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995187449] [2021-11-03 22:19:32,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:19:32,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 22:19:32,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:19:32,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 22:19:32,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-03 22:19:32,619 INFO L87 Difference]: Start difference. First operand 231 states and 255 transitions. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:19:34,934 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:19:38,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:19:38,116 INFO L93 Difference]: Finished difference Result 341 states and 377 transitions. [2021-11-03 22:19:38,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 22:19:38,117 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-03 22:19:38,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:19:38,118 INFO L225 Difference]: With dead ends: 341 [2021-11-03 22:19:38,118 INFO L226 Difference]: Without dead ends: 255 [2021-11-03 22:19:38,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 464.04ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-11-03 22:19:38,119 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 597 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4777.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.24ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5218.58ms IncrementalHoareTripleChecker+Time [2021-11-03 22:19:38,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 0 Invalid, 1083 Unknown, 0 Unchecked, 8.24ms Time], IncrementalHoareTripleChecker [18 Valid, 1064 Invalid, 1 Unknown, 0 Unchecked, 5218.58ms Time] [2021-11-03 22:19:38,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-03 22:19:38,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 229. [2021-11-03 22:19:38,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 223 states have (on average 1.1300448430493273) internal successors, (252), 228 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:19:38,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 252 transitions. [2021-11-03 22:19:38,125 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 252 transitions. Word has length 87 [2021-11-03 22:19:38,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:19:38,125 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 252 transitions. [2021-11-03 22:19:38,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:19:38,125 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 252 transitions. [2021-11-03 22:19:38,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-03 22:19:38,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:19:38,126 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:19:38,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-03 22:19:38,126 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:19:38,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:19:38,127 INFO L85 PathProgramCache]: Analyzing trace with hash -2037445720, now seen corresponding path program 1 times [2021-11-03 22:19:38,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:19:38,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967815523] [2021-11-03 22:19:38,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:19:38,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:19:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:19:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:19:38,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:19:38,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967815523] [2021-11-03 22:19:38,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967815523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:19:38,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:19:38,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 22:19:38,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808354772] [2021-11-03 22:19:38,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:19:38,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 22:19:38,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:19:38,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 22:19:38,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 22:19:38,433 INFO L87 Difference]: Start difference. First operand 229 states and 252 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:19:40,476 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:19:42,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:19:42,937 INFO L93 Difference]: Finished difference Result 338 states and 372 transitions. [2021-11-03 22:19:42,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 22:19:42,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-03 22:19:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:19:42,938 INFO L225 Difference]: With dead ends: 338 [2021-11-03 22:19:42,938 INFO L226 Difference]: Without dead ends: 241 [2021-11-03 22:19:42,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 288.12ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 22:19:42,939 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3886.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.85ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4280.14ms IncrementalHoareTripleChecker+Time [2021-11-03 22:19:42,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 869 Unknown, 0 Unchecked, 3.85ms Time], IncrementalHoareTripleChecker [9 Valid, 859 Invalid, 1 Unknown, 0 Unchecked, 4280.14ms Time] [2021-11-03 22:19:42,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-03 22:19:42,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 229. [2021-11-03 22:19:42,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 223 states have (on average 1.1210762331838564) internal successors, (250), 228 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:19:42,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 250 transitions. [2021-11-03 22:19:42,946 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 250 transitions. Word has length 87 [2021-11-03 22:19:42,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:19:42,946 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 250 transitions. [2021-11-03 22:19:42,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:19:42,946 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 250 transitions. [2021-11-03 22:19:42,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-03 22:19:42,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:19:42,947 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:19:42,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-03 22:19:42,947 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:19:42,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:19:42,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1636843523, now seen corresponding path program 1 times [2021-11-03 22:19:42,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:19:42,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129043277] [2021-11-03 22:19:42,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:19:42,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:19:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:19:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:19:43,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:19:43,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129043277] [2021-11-03 22:19:43,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129043277] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 22:19:43,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:19:43,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-03 22:19:43,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083364161] [2021-11-03 22:19:43,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-03 22:19:43,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 22:19:43,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:19:43,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 22:19:43,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-03 22:19:43,335 INFO L87 Difference]: Start difference. First operand 229 states and 250 transitions. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:19:45,383 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:19:49,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:19:49,048 INFO L93 Difference]: Finished difference Result 394 states and 433 transitions. [2021-11-03 22:19:49,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-03 22:19:49,048 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-03 22:19:49,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:19:49,049 INFO L225 Difference]: With dead ends: 394 [2021-11-03 22:19:49,049 INFO L226 Difference]: Without dead ends: 390 [2021-11-03 22:19:49,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 519.83ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-03 22:19:49,050 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 296 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 106 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4889.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.02ms SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5295.28ms IncrementalHoareTripleChecker+Time [2021-11-03 22:19:49,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 0 Invalid, 1258 Unknown, 0 Unchecked, 8.02ms Time], IncrementalHoareTripleChecker [106 Valid, 1151 Invalid, 1 Unknown, 0 Unchecked, 5295.28ms Time] [2021-11-03 22:19:49,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-03 22:19:49,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 232. [2021-11-03 22:19:49,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 226 states have (on average 1.1150442477876106) internal successors, (252), 231 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:19:49,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 252 transitions. [2021-11-03 22:19:49,057 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 252 transitions. Word has length 89 [2021-11-03 22:19:49,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:19:49,057 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 252 transitions. [2021-11-03 22:19:49,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:19:49,057 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 252 transitions. [2021-11-03 22:19:49,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-03 22:19:49,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:19:49,058 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:19:49,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-03 22:19:49,058 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:19:49,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:19:49,059 INFO L85 PathProgramCache]: Analyzing trace with hash -2111945076, now seen corresponding path program 1 times [2021-11-03 22:19:49,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-03 22:19:49,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467534266] [2021-11-03 22:19:49,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:19:49,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 22:19:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:19:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:19:53,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-03 22:19:53,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467534266] [2021-11-03 22:19:53,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467534266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 22:19:53,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936685742] [2021-11-03 22:19:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:19:53,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 22:19:53,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 22:19:53,517 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) [2021-11-03 22:19:53,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 22:19:54,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:19:54,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 2959 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-03 22:19:54,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 22:19:54,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-03 22:19:55,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 22:19:55,974 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2021-11-03 22:19:56,416 INFO L354 Elim1Store]: treesize reduction 168, result has 18.0 percent of original size [2021-11-03 22:19:56,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 128 treesize of output 154 [2021-11-03 22:19:56,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 22:19:56,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 25 [2021-11-03 22:19:56,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 22:19:56,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 25 [2021-11-03 22:19:56,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 22:19:56,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 23 [2021-11-03 22:19:56,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 22:19:56,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 23 [2021-11-03 22:19:57,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 22:19:57,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 23 [2021-11-03 22:19:57,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 22:19:57,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 23 [2021-11-03 22:19:58,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 22:19:58,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 79 [2021-11-03 22:20:00,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 22:20:00,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 39 [2021-11-03 22:20:45,362 INFO L354 Elim1Store]: treesize reduction 318, result has 12.9 percent of original size [2021-11-03 22:20:45,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 337 treesize of output 208 [2021-11-03 22:20:51,606 INFO L354 Elim1Store]: treesize reduction 150, result has 36.2 percent of original size [2021-11-03 22:20:51,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 354 treesize of output 248 [2021-11-03 22:20:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:20:52,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 22:20:56,762 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((aux_mod_ULTIMATE.start_memset_impl_~i~4_58 Int)) (or (< 9223372036854775807 aux_mod_ULTIMATE.start_memset_impl_~i~4_58) (and (forall ((aux_mod_ULTIMATE.start_memset_impl_~c_39 Int) (ULTIMATE.start_memset_impl_~sp~0.offset Int)) (or (<= 256 aux_mod_ULTIMATE.start_memset_impl_~c_39) (<= aux_mod_ULTIMATE.start_memset_impl_~c_39 127) (not (= (select (store (select (store |c_#memory_int| c_ULTIMATE.start_memset_impl_~sp~0.base (store (select |c_#memory_int| c_ULTIMATE.start_memset_impl_~sp~0.base) (+ ULTIMATE.start_memset_impl_~sp~0.offset (mod aux_mod_ULTIMATE.start_memset_impl_~i~4_58 18446744073709551616)) (+ (- 256) (mod aux_mod_ULTIMATE.start_memset_impl_~c_39 256)))) c_ULTIMATE.start_aws_byte_buf_secure_zero_~buf.base) c_ULTIMATE.start_aws_byte_buf_secure_zero_~buf.offset 0) (+ c_ULTIMATE.start_aws_byte_buf_secure_zero_~buf.offset 16)) 0)))) (forall ((aux_mod_ULTIMATE.start_memset_impl_~c_39 Int) (ULTIMATE.start_memset_impl_~sp~0.offset Int)) (or (< 127 aux_mod_ULTIMATE.start_memset_impl_~c_39) (not (= (select (store (select (store |c_#memory_int| c_ULTIMATE.start_memset_impl_~sp~0.base (store (select |c_#memory_int| c_ULTIMATE.start_memset_impl_~sp~0.base) (+ ULTIMATE.start_memset_impl_~sp~0.offset (mod aux_mod_ULTIMATE.start_memset_impl_~i~4_58 18446744073709551616)) (mod aux_mod_ULTIMATE.start_memset_impl_~c_39 256))) c_ULTIMATE.start_aws_byte_buf_secure_zero_~buf.base) c_ULTIMATE.start_aws_byte_buf_secure_zero_~buf.offset 0) (+ c_ULTIMATE.start_aws_byte_buf_secure_zero_~buf.offset 16)) 0)) (< aux_mod_ULTIMATE.start_memset_impl_~c_39 0)))) (< aux_mod_ULTIMATE.start_memset_impl_~i~4_58 0))) (forall ((aux_mod_ULTIMATE.start_memset_impl_~i~4_58 Int)) (or (<= aux_mod_ULTIMATE.start_memset_impl_~i~4_58 9223372036854775807) (<= 18446744073709551616 aux_mod_ULTIMATE.start_memset_impl_~i~4_58) (and (forall ((aux_mod_ULTIMATE.start_memset_impl_~c_39 Int) (ULTIMATE.start_memset_impl_~sp~0.offset Int)) (or (<= 256 aux_mod_ULTIMATE.start_memset_impl_~c_39) (<= aux_mod_ULTIMATE.start_memset_impl_~c_39 127) (not (= (select (store (select (store |c_#memory_int| c_ULTIMATE.start_memset_impl_~sp~0.base (store (select |c_#memory_int| c_ULTIMATE.start_memset_impl_~sp~0.base) (+ ULTIMATE.start_memset_impl_~sp~0.offset (- 18446744073709551616) (mod aux_mod_ULTIMATE.start_memset_impl_~i~4_58 18446744073709551616)) (+ (- 256) (mod aux_mod_ULTIMATE.start_memset_impl_~c_39 256)))) c_ULTIMATE.start_aws_byte_buf_secure_zero_~buf.base) c_ULTIMATE.start_aws_byte_buf_secure_zero_~buf.offset 0) (+ c_ULTIMATE.start_aws_byte_buf_secure_zero_~buf.offset 16)) 0)))) (forall ((aux_mod_ULTIMATE.start_memset_impl_~c_39 Int) (ULTIMATE.start_memset_impl_~sp~0.offset Int)) (or (< 127 aux_mod_ULTIMATE.start_memset_impl_~c_39) (not (= (select (store (select (store |c_#memory_int| c_ULTIMATE.start_memset_impl_~sp~0.base (store (select |c_#memory_int| c_ULTIMATE.start_memset_impl_~sp~0.base) (+ ULTIMATE.start_memset_impl_~sp~0.offset (- 18446744073709551616) (mod aux_mod_ULTIMATE.start_memset_impl_~i~4_58 18446744073709551616)) (mod aux_mod_ULTIMATE.start_memset_impl_~c_39 256))) c_ULTIMATE.start_aws_byte_buf_secure_zero_~buf.base) c_ULTIMATE.start_aws_byte_buf_secure_zero_~buf.offset 0) (+ c_ULTIMATE.start_aws_byte_buf_secure_zero_~buf.offset 16)) 0)) (< aux_mod_ULTIMATE.start_memset_impl_~c_39 0))))))) is different from false [2021-11-03 22:21:10,446 INFO L354 Elim1Store]: treesize reduction 108, result has 60.7 percent of original size [2021-11-03 22:21:10,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 178 treesize of output 276 [2021-11-03 22:21:10,476 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 22:21:10,477 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 276 treesize of output 274 [2021-11-03 22:21:10,509 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 22:21:10,509 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 274 treesize of output 272 [2021-11-03 22:21:10,548 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 22:21:10,548 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 272 treesize of output 270 [2021-11-03 22:21:10,579 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 22:21:10,580 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 270 treesize of output 268 [2021-11-03 22:21:10,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-11-03 22:21:10,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-03 22:21:10,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-03 22:21:10,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112892825] [2021-11-03 22:21:10,586 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-03 22:21:10,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-03 22:21:10,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-03 22:21:10,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-03 22:21:10,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=4, NotChecked=58, Total=992 [2021-11-03 22:21:10,587 INFO L87 Difference]: Start difference. First operand 232 states and 252 transitions. Second operand has 17 states, 17 states have (on average 5.235294117647059) internal successors, (89), 17 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:21:10,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 22:21:10,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 17603.58ms TimeCoverageRelationStatistics Valid=98, Invalid=832, Unknown=4, NotChecked=58, Total=992 [2021-11-03 22:21:10,589 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.00ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-03 22:21:10,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.00ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-03 22:21:10,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 22:21:10,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-03 22:21:10,796 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@270078ac at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.chooseFalseSuccessor2(BasicAbstractInterpolantAutomaton.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:73) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-03 22:21:10,799 INFO L158 Benchmark]: Toolchain (without parser) took 213791.03ms. Allocated memory was 102.8MB in the beginning and 469.8MB in the end (delta: 367.0MB). Free memory was 64.1MB in the beginning and 308.7MB in the end (delta: -244.7MB). Peak memory consumption was 122.1MB. Max. memory is 16.1GB. [2021-11-03 22:21:10,799 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 102.8MB. Free memory was 60.1MB in the beginning and 60.1MB in the end (delta: 43.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-03 22:21:10,799 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1778.44ms. Allocated memory was 102.8MB in the beginning and 127.9MB in the end (delta: 25.2MB). Free memory was 63.7MB in the beginning and 54.4MB in the end (delta: 9.3MB). Peak memory consumption was 63.1MB. Max. memory is 16.1GB. [2021-11-03 22:21:10,799 INFO L158 Benchmark]: Boogie Procedure Inliner took 190.17ms. Allocated memory is still 127.9MB. Free memory was 54.4MB in the beginning and 74.8MB in the end (delta: -20.4MB). Peak memory consumption was 15.2MB. Max. memory is 16.1GB. [2021-11-03 22:21:10,799 INFO L158 Benchmark]: Boogie Preprocessor took 96.50ms. Allocated memory is still 127.9MB. Free memory was 74.8MB in the beginning and 66.3MB in the end (delta: 8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-03 22:21:10,799 INFO L158 Benchmark]: RCFGBuilder took 4582.77ms. Allocated memory was 127.9MB in the beginning and 299.9MB in the end (delta: 172.0MB). Free memory was 66.3MB in the beginning and 114.0MB in the end (delta: -47.7MB). Peak memory consumption was 177.8MB. Max. memory is 16.1GB. [2021-11-03 22:21:10,800 INFO L158 Benchmark]: TraceAbstraction took 207138.62ms. Allocated memory was 299.9MB in the beginning and 469.8MB in the end (delta: 169.9MB). Free memory was 114.0MB in the beginning and 308.7MB in the end (delta: -194.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-03 22:21:10,801 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 102.8MB. Free memory was 60.1MB in the beginning and 60.1MB in the end (delta: 43.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1778.44ms. Allocated memory was 102.8MB in the beginning and 127.9MB in the end (delta: 25.2MB). Free memory was 63.7MB in the beginning and 54.4MB in the end (delta: 9.3MB). Peak memory consumption was 63.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 190.17ms. Allocated memory is still 127.9MB. Free memory was 54.4MB in the beginning and 74.8MB in the end (delta: -20.4MB). Peak memory consumption was 15.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 96.50ms. Allocated memory is still 127.9MB. Free memory was 74.8MB in the beginning and 66.3MB in the end (delta: 8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 4582.77ms. Allocated memory was 127.9MB in the beginning and 299.9MB in the end (delta: 172.0MB). Free memory was 66.3MB in the beginning and 114.0MB in the end (delta: -47.7MB). Peak memory consumption was 177.8MB. Max. memory is 16.1GB. * TraceAbstraction took 207138.62ms. Allocated memory was 299.9MB in the beginning and 469.8MB in the end (delta: 169.9MB). Free memory was 114.0MB in the beginning and 308.7MB in the end (delta: -194.7MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@270078ac de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@270078ac: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-03 22:21:10,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.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 e401a4e4197b43467958a92870f8195ba22195c146137fa78352c627ea2eeb40 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-c36dfa3 [2021-11-03 22:21:12,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 22:21:12,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 22:21:12,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 22:21:12,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 22:21:12,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 22:21:12,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 22:21:12,492 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 22:21:12,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 22:21:12,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 22:21:12,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 22:21:12,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 22:21:12,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 22:21:12,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 22:21:12,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 22:21:12,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 22:21:12,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 22:21:12,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 22:21:12,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 22:21:12,517 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 22:21:12,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 22:21:12,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 22:21:12,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 22:21:12,522 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 22:21:12,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 22:21:12,525 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 22:21:12,525 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 22:21:12,527 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 22:21:12,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 22:21:12,528 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 22:21:12,528 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 22:21:12,529 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 22:21:12,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 22:21:12,530 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 22:21:12,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 22:21:12,531 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 22:21:12,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 22:21:12,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 22:21:12,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 22:21:12,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 22:21:12,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 22:21:12,534 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-11-03 22:21:12,555 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 22:21:12,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 22:21:12,557 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-03 22:21:12,557 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-03 22:21:12,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 22:21:12,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 22:21:12,558 INFO L138 SettingsManager]: * Use SBE=true [2021-11-03 22:21:12,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 22:21:12,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 22:21:12,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 22:21:12,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 22:21:12,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 22:21:12,560 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 22:21:12,560 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 22:21:12,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 22:21:12,560 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 22:21:12,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 22:21:12,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 22:21:12,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 22:21:12,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 22:21:12,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 22:21:12,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 22:21:12,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 22:21:12,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 22:21:12,562 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-03 22:21:12,570 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 22:21:12,570 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-03 22:21:12,570 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-03 22:21:12,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 22:21:12,571 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 22:21:12,571 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 22:21:12,571 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e401a4e4197b43467958a92870f8195ba22195c146137fa78352c627ea2eeb40 [2021-11-03 22:21:12,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 22:21:12,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 22:21:12,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 22:21:12,830 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 22:21:12,830 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 22:21:12,831 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i [2021-11-03 22:21:12,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2f35e8a5/c52878ddf4a34673b19027accd13f1ce/FLAG4d36d3cd3 [2021-11-03 22:21:13,419 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 22:21:13,420 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i [2021-11-03 22:21:13,444 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2f35e8a5/c52878ddf4a34673b19027accd13f1ce/FLAG4d36d3cd3 [2021-11-03 22:21:13,673 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2f35e8a5/c52878ddf4a34673b19027accd13f1ce [2021-11-03 22:21:13,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 22:21:13,678 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 22:21:13,678 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 22:21:13,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 22:21:13,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 22:21:13,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 10:21:13" (1/1) ... [2021-11-03 22:21:13,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@234317e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:21:13, skipping insertion in model container [2021-11-03 22:21:13,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 10:21:13" (1/1) ... [2021-11-03 22:21:13,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 22:21:13,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 22:21:13,964 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i[4502,4515] [2021-11-03 22:21:13,969 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i[4562,4575] [2021-11-03 22:21:13,988 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 22:21:13,993 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 22:21:14,470 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:21:14,472 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:21:14,472 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:21:14,473 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:21:14,473 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:21:14,487 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:21:14,487 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:21:14,488 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:21:14,488 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:21:14,692 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 22:21:14,693 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 22:21:14,694 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 22:21:14,694 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 22:21:14,695 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 22:21:14,695 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 22:21:14,696 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 22:21:14,696 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 22:21:14,696 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 22:21:14,697 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 22:21:14,786 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 22:21:14,832 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:21:14,833 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:21:14,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 22:21:14,951 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 22:21:14,968 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i[4502,4515] [2021-11-03 22:21:14,968 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/aws-c-common/aws_byte_buf_clean_up_secure_harness.i[4562,4575] [2021-11-03 22:21:14,970 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-03 22:21:14,970 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-03 22:21:15,000 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:21:15,000 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:21:15,000 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:21:15,000 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:21:15,001 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:21:15,024 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:21:15,024 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:21:15,025 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:21:15,025 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:21:15,070 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-03 22:21:15,070 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-03 22:21:15,070 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-03 22:21:15,071 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-03 22:21:15,072 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-03 22:21:15,072 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-03 22:21:15,073 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-03 22:21:15,073 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-03 22:21:15,073 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-03 22:21:15,073 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-03 22:21:15,096 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-03 22:21:15,133 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:21:15,133 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-03 22:21:15,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 22:21:15,378 INFO L208 MainTranslator]: Completed translation [2021-11-03 22:21:15,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:21:15 WrapperNode [2021-11-03 22:21:15,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 22:21:15,380 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 22:21:15,380 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 22:21:15,380 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 22:21:15,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:21:15" (1/1) ... [2021-11-03 22:21:15,470 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:21:15" (1/1) ... [2021-11-03 22:21:15,548 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 22:21:15,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 22:21:15,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 22:21:15,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 22:21:15,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:21:15" (1/1) ... [2021-11-03 22:21:15,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:21:15" (1/1) ... [2021-11-03 22:21:15,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:21:15" (1/1) ... [2021-11-03 22:21:15,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:21:15" (1/1) ... [2021-11-03 22:21:15,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:21:15" (1/1) ... [2021-11-03 22:21:15,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:21:15" (1/1) ... [2021-11-03 22:21:15,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:21:15" (1/1) ... [2021-11-03 22:21:15,621 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 22:21:15,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 22:21:15,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 22:21:15,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 22:21:15,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:21:15" (1/1) ... [2021-11-03 22:21:15,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 22:21:15,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-03 22:21:15,667 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) [2021-11-03 22:21:15,686 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 [2021-11-03 22:21:15,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 22:21:15,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 22:21:15,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-03 22:21:15,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 22:21:15,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 22:21:15,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 22:21:15,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 22:21:15,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-03 22:21:15,698 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 22:21:15,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 22:21:15,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-03 22:21:15,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-03 22:21:15,698 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 22:21:21,885 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 22:21:21,886 INFO L299 CfgBuilder]: Removed 73 assume(true) statements. [2021-11-03 22:21:21,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 10:21:21 BoogieIcfgContainer [2021-11-03 22:21:21,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 22:21:21,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 22:21:21,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 22:21:21,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 22:21:21,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 10:21:13" (1/3) ... [2021-11-03 22:21:21,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2857bf51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 10:21:21, skipping insertion in model container [2021-11-03 22:21:21,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 10:21:15" (2/3) ... [2021-11-03 22:21:21,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2857bf51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 10:21:21, skipping insertion in model container [2021-11-03 22:21:21,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 10:21:21" (3/3) ... [2021-11-03 22:21:21,895 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_clean_up_secure_harness.i [2021-11-03 22:21:21,899 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 22:21:21,899 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-03 22:21:21,935 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 22:21:21,940 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 [2021-11-03 22:21:21,944 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-03 22:21:21,957 INFO L276 IsEmpty]: Start isEmpty. Operand has 161 states, 154 states have (on average 1.4610389610389611) internal successors, (225), 160 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:21:21,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 22:21:21,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:21:21,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:21:21,964 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:21:21,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:21:21,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1283718026, now seen corresponding path program 1 times [2021-11-03 22:21:21,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-03 22:21:21,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131669693] [2021-11-03 22:21:21,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:21:21,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 22:21:21,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-03 22:21:21,991 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 22:21:22,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 22:21:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:21:24,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 1606 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 22:21:24,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 22:21:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:21:24,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 22:21:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:21:24,368 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-03 22:21:24,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131669693] [2021-11-03 22:21:24,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131669693] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 22:21:24,369 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:21:24,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 22:21:24,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875423360] [2021-11-03 22:21:24,371 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-03 22:21:24,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 22:21:24,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-03 22:21:24,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 22:21:24,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 22:21:24,393 INFO L87 Difference]: Start difference. First operand has 161 states, 154 states have (on average 1.4610389610389611) internal successors, (225), 160 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:21:26,654 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:21:27,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:21:27,671 INFO L93 Difference]: Finished difference Result 318 states and 445 transitions. [2021-11-03 22:21:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 22:21:27,678 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-03 22:21:27,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:21:27,685 INFO L225 Difference]: With dead ends: 318 [2021-11-03 22:21:27,687 INFO L226 Difference]: Without dead ends: 156 [2021-11-03 22:21:27,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.16ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 22:21:27,696 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3036.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.68ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3216.66ms IncrementalHoareTripleChecker+Time [2021-11-03 22:21:27,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 209 Unknown, 0 Unchecked, 3.68ms Time], IncrementalHoareTripleChecker [0 Valid, 208 Invalid, 1 Unknown, 0 Unchecked, 3216.66ms Time] [2021-11-03 22:21:27,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-03 22:21:27,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2021-11-03 22:21:27,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 150 states have (on average 1.36) internal successors, (204), 155 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:21:27,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 204 transitions. [2021-11-03 22:21:27,743 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 204 transitions. Word has length 34 [2021-11-03 22:21:27,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:21:27,749 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 204 transitions. [2021-11-03 22:21:27,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:21:27,749 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 204 transitions. [2021-11-03 22:21:27,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 22:21:27,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:21:27,750 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:21:27,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 22:21:27,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-03 22:21:27,964 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:21:27,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:21:27,964 INFO L85 PathProgramCache]: Analyzing trace with hash 27354892, now seen corresponding path program 1 times [2021-11-03 22:21:27,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-03 22:21:27,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131711585] [2021-11-03 22:21:27,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:21:27,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 22:21:27,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-03 22:21:27,968 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 22:21:27,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 22:21:30,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:21:30,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 1606 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 22:21:30,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 22:21:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:21:30,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 22:21:30,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:21:30,713 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-03 22:21:30,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [131711585] [2021-11-03 22:21:30,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [131711585] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 22:21:30,713 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:21:30,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 22:21:30,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227328467] [2021-11-03 22:21:30,713 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-03 22:21:30,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 22:21:30,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-03 22:21:30,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 22:21:30,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 22:21:30,715 INFO L87 Difference]: Start difference. First operand 156 states and 204 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:21:32,915 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:21:34,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:21:34,200 INFO L93 Difference]: Finished difference Result 286 states and 374 transitions. [2021-11-03 22:21:34,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 22:21:34,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-03 22:21:34,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:21:34,202 INFO L225 Difference]: With dead ends: 286 [2021-11-03 22:21:34,202 INFO L226 Difference]: Without dead ends: 156 [2021-11-03 22:21:34,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.15ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 22:21:34,203 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 295 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3231.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.72ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3416.55ms IncrementalHoareTripleChecker+Time [2021-11-03 22:21:34,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 0 Invalid, 299 Unknown, 0 Unchecked, 8.72ms Time], IncrementalHoareTripleChecker [6 Valid, 292 Invalid, 1 Unknown, 0 Unchecked, 3416.55ms Time] [2021-11-03 22:21:34,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-03 22:21:34,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2021-11-03 22:21:34,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 150 states have (on average 1.3466666666666667) internal successors, (202), 155 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:21:34,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 202 transitions. [2021-11-03 22:21:34,209 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 202 transitions. Word has length 34 [2021-11-03 22:21:34,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:21:34,210 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 202 transitions. [2021-11-03 22:21:34,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:21:34,211 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 202 transitions. [2021-11-03 22:21:34,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-03 22:21:34,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:21:34,212 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:21:34,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 22:21:34,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-03 22:21:34,436 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:21:34,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:21:34,436 INFO L85 PathProgramCache]: Analyzing trace with hash -2136977490, now seen corresponding path program 1 times [2021-11-03 22:21:34,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-03 22:21:34,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963295713] [2021-11-03 22:21:34,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:21:34,440 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 22:21:34,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-03 22:21:34,440 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 22:21:34,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 22:21:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:21:36,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 22:21:36,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 22:21:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:21:36,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 22:21:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:21:36,974 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-03 22:21:36,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963295713] [2021-11-03 22:21:36,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963295713] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 22:21:36,975 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:21:36,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 22:21:36,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045202232] [2021-11-03 22:21:36,975 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-03 22:21:36,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 22:21:36,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-03 22:21:36,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 22:21:36,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 22:21:36,976 INFO L87 Difference]: Start difference. First operand 156 states and 202 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:21:39,194 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:21:41,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:21:41,296 INFO L93 Difference]: Finished difference Result 347 states and 456 transitions. [2021-11-03 22:21:41,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 22:21:41,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-03 22:21:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:21:41,297 INFO L225 Difference]: With dead ends: 347 [2021-11-03 22:21:41,297 INFO L226 Difference]: Without dead ends: 216 [2021-11-03 22:21:41,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.99ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 22:21:41,299 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 138 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 21 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4038.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.06ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4252.64ms IncrementalHoareTripleChecker+Time [2021-11-03 22:21:41,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 0 Invalid, 643 Unknown, 0 Unchecked, 10.06ms Time], IncrementalHoareTripleChecker [21 Valid, 621 Invalid, 1 Unknown, 0 Unchecked, 4252.64ms Time] [2021-11-03 22:21:41,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-03 22:21:41,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 168. [2021-11-03 22:21:41,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 162 states have (on average 1.3209876543209877) internal successors, (214), 167 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:21:41,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 214 transitions. [2021-11-03 22:21:41,307 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 214 transitions. Word has length 46 [2021-11-03 22:21:41,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:21:41,307 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 214 transitions. [2021-11-03 22:21:41,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:21:41,308 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 214 transitions. [2021-11-03 22:21:41,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-03 22:21:41,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:21:41,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:21:41,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 22:21:41,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-03 22:21:41,517 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:21:41,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:21:41,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1456389932, now seen corresponding path program 1 times [2021-11-03 22:21:41,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-03 22:21:41,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119382591] [2021-11-03 22:21:41,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:21:41,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 22:21:41,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-03 22:21:41,522 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 22:21:41,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 22:21:43,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:21:43,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 1632 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 22:21:43,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 22:21:44,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-03 22:21:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:21:44,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 22:21:44,852 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 [2021-11-03 22:21:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:21:45,139 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-03 22:21:45,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119382591] [2021-11-03 22:21:45,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119382591] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 22:21:45,139 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:21:45,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 13 [2021-11-03 22:21:45,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15752169] [2021-11-03 22:21:45,140 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-03 22:21:45,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-03 22:21:45,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-03 22:21:45,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-03 22:21:45,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-03 22:21:45,141 INFO L87 Difference]: Start difference. First operand 168 states and 214 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:21:47,362 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:21:53,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:21:53,281 INFO L93 Difference]: Finished difference Result 347 states and 445 transitions. [2021-11-03 22:21:53,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-03 22:21:53,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-03 22:21:53,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:21:53,285 INFO L225 Difference]: With dead ends: 347 [2021-11-03 22:21:53,286 INFO L226 Difference]: Without dead ends: 206 [2021-11-03 22:21:53,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1180.55ms TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2021-11-03 22:21:53,287 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 465 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 22 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6928.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.43ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7389.15ms IncrementalHoareTripleChecker+Time [2021-11-03 22:21:53,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 0 Invalid, 1304 Unknown, 0 Unchecked, 25.43ms Time], IncrementalHoareTripleChecker [22 Valid, 1281 Invalid, 1 Unknown, 0 Unchecked, 7389.15ms Time] [2021-11-03 22:21:53,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-03 22:21:53,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 164. [2021-11-03 22:21:53,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 158 states have (on average 1.3164556962025316) internal successors, (208), 163 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:21:53,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 208 transitions. [2021-11-03 22:21:53,295 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 208 transitions. Word has length 46 [2021-11-03 22:21:53,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:21:53,295 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 208 transitions. [2021-11-03 22:21:53,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:21:53,295 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 208 transitions. [2021-11-03 22:21:53,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 22:21:53,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:21:53,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:21:53,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 22:21:53,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-03 22:21:53,511 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:21:53,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:21:53,511 INFO L85 PathProgramCache]: Analyzing trace with hash -738588498, now seen corresponding path program 1 times [2021-11-03 22:21:53,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-03 22:21:53,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373408381] [2021-11-03 22:21:53,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:21:53,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 22:21:53,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-03 22:21:53,515 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 22:21:53,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 22:21:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:21:55,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 1647 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 22:21:55,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 22:21:55,865 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-03 22:21:55,866 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 59 treesize of output 23 [2021-11-03 22:21:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:21:56,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 22:21:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:21:56,407 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-03 22:21:56,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [373408381] [2021-11-03 22:21:56,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [373408381] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 22:21:56,407 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:21:56,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-03 22:21:56,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104436122] [2021-11-03 22:21:56,408 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-03 22:21:56,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 22:21:56,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-03 22:21:56,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 22:21:56,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 22:21:56,409 INFO L87 Difference]: Start difference. First operand 164 states and 208 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:21:58,624 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:22:04,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:22:04,041 INFO L93 Difference]: Finished difference Result 499 states and 628 transitions. [2021-11-03 22:22:04,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 22:22:04,042 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-03 22:22:04,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:22:04,043 INFO L225 Difference]: With dead ends: 499 [2021-11-03 22:22:04,043 INFO L226 Difference]: Without dead ends: 355 [2021-11-03 22:22:04,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 382.65ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-03 22:22:04,044 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 658 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6867.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.28ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7413.99ms IncrementalHoareTripleChecker+Time [2021-11-03 22:22:04,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [658 Valid, 0 Invalid, 1244 Unknown, 0 Unchecked, 18.28ms Time], IncrementalHoareTripleChecker [39 Valid, 1204 Invalid, 1 Unknown, 0 Unchecked, 7413.99ms Time] [2021-11-03 22:22:04,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-11-03 22:22:04,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 202. [2021-11-03 22:22:04,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 196 states have (on average 1.3061224489795917) internal successors, (256), 201 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:22:04,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 256 transitions. [2021-11-03 22:22:04,052 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 256 transitions. Word has length 54 [2021-11-03 22:22:04,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:22:04,053 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 256 transitions. [2021-11-03 22:22:04,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:22:04,053 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 256 transitions. [2021-11-03 22:22:04,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 22:22:04,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:22:04,054 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:22:04,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 22:22:04,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-03 22:22:04,278 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:22:04,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:22:04,279 INFO L85 PathProgramCache]: Analyzing trace with hash -710253458, now seen corresponding path program 1 times [2021-11-03 22:22:04,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-03 22:22:04,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702131841] [2021-11-03 22:22:04,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:22:04,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 22:22:04,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-03 22:22:04,283 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 22:22:04,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 22:22:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:22:06,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 1641 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-03 22:22:06,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 22:22:06,580 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-03 22:22:06,580 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 59 treesize of output 23 [2021-11-03 22:22:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:22:06,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 22:22:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:22:07,339 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-03 22:22:07,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702131841] [2021-11-03 22:22:07,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [702131841] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 22:22:07,339 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:22:07,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 12 [2021-11-03 22:22:07,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352096066] [2021-11-03 22:22:07,340 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-03 22:22:07,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 22:22:07,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-03 22:22:07,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 22:22:07,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-03 22:22:07,340 INFO L87 Difference]: Start difference. First operand 202 states and 256 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:22:09,532 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:22:22,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:22:22,451 INFO L93 Difference]: Finished difference Result 588 states and 705 transitions. [2021-11-03 22:22:22,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-03 22:22:22,452 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-03 22:22:22,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:22:22,454 INFO L225 Difference]: With dead ends: 588 [2021-11-03 22:22:22,454 INFO L226 Difference]: Without dead ends: 327 [2021-11-03 22:22:22,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1568.19ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-11-03 22:22:22,455 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 399 mSDsluCounter, 1410 mSDsCounter, 0 mSdLazyCounter, 3037 mSolverCounterSat, 146 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13000.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.49ms SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 3037 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13886.62ms IncrementalHoareTripleChecker+Time [2021-11-03 22:22:22,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 0 Invalid, 3184 Unknown, 0 Unchecked, 25.49ms Time], IncrementalHoareTripleChecker [146 Valid, 3037 Invalid, 1 Unknown, 0 Unchecked, 13886.62ms Time] [2021-11-03 22:22:22,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-03 22:22:22,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 190. [2021-11-03 22:22:22,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 184 states have (on average 1.2282608695652173) internal successors, (226), 189 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:22:22,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 226 transitions. [2021-11-03 22:22:22,461 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 226 transitions. Word has length 54 [2021-11-03 22:22:22,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:22:22,461 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 226 transitions. [2021-11-03 22:22:22,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:22:22,461 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 226 transitions. [2021-11-03 22:22:22,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 22:22:22,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:22:22,463 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:22:22,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 22:22:22,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-03 22:22:22,670 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:22:22,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:22:22,670 INFO L85 PathProgramCache]: Analyzing trace with hash -869117129, now seen corresponding path program 1 times [2021-11-03 22:22:22,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-03 22:22:22,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903899189] [2021-11-03 22:22:22,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:22:22,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 22:22:22,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-03 22:22:22,675 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 22:22:22,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 22:22:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:22:24,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 1667 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-03 22:22:24,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 22:22:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:22:25,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 22:22:26,338 INFO L354 Elim1Store]: treesize reduction 51, result has 40.0 percent of original size [2021-11-03 22:22:26,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 45 [2021-11-03 22:22:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:22:27,101 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-03 22:22:27,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903899189] [2021-11-03 22:22:27,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903899189] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 22:22:27,102 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:22:27,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 13 [2021-11-03 22:22:27,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049559352] [2021-11-03 22:22:27,102 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-03 22:22:27,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-03 22:22:27,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-03 22:22:27,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-03 22:22:27,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-03 22:22:27,103 INFO L87 Difference]: Start difference. First operand 190 states and 226 transitions. Second operand has 13 states, 13 states have (on average 7.153846153846154) internal successors, (93), 13 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:22:29,305 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:22:36,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:22:36,044 INFO L93 Difference]: Finished difference Result 387 states and 454 transitions. [2021-11-03 22:22:36,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 22:22:36,045 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.153846153846154) internal successors, (93), 13 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-03 22:22:36,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:22:36,045 INFO L225 Difference]: With dead ends: 387 [2021-11-03 22:22:36,046 INFO L226 Difference]: Without dead ends: 214 [2021-11-03 22:22:36,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1317.51ms TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-11-03 22:22:36,047 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 463 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7548.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.28ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8042.85ms IncrementalHoareTripleChecker+Time [2021-11-03 22:22:36,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 0 Invalid, 1436 Unknown, 0 Unchecked, 12.28ms Time], IncrementalHoareTripleChecker [26 Valid, 1409 Invalid, 1 Unknown, 0 Unchecked, 8042.85ms Time] [2021-11-03 22:22:36,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-03 22:22:36,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 182. [2021-11-03 22:22:36,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 176 states have (on average 1.1818181818181819) internal successors, (208), 181 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:22:36,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 208 transitions. [2021-11-03 22:22:36,053 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 208 transitions. Word has length 64 [2021-11-03 22:22:36,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:22:36,054 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 208 transitions. [2021-11-03 22:22:36,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.153846153846154) internal successors, (93), 13 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:22:36,054 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 208 transitions. [2021-11-03 22:22:36,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 22:22:36,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:22:36,057 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:22:36,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-03 22:22:36,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-03 22:22:36,287 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:22:36,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:22:36,288 INFO L85 PathProgramCache]: Analyzing trace with hash -594357515, now seen corresponding path program 1 times [2021-11-03 22:22:36,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-03 22:22:36,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675006218] [2021-11-03 22:22:36,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:22:36,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 22:22:36,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-03 22:22:36,294 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 22:22:36,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 22:22:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:22:38,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-03 22:22:38,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 22:22:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:22:39,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 22:22:40,238 INFO L354 Elim1Store]: treesize reduction 39, result has 46.6 percent of original size [2021-11-03 22:22:40,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 45 [2021-11-03 22:22:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:22:41,141 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-03 22:22:41,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675006218] [2021-11-03 22:22:41,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675006218] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 22:22:41,141 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:22:41,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 12 [2021-11-03 22:22:41,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994799036] [2021-11-03 22:22:41,141 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-03 22:22:41,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 22:22:41,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-03 22:22:41,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 22:22:41,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-03 22:22:41,142 INFO L87 Difference]: Start difference. First operand 182 states and 208 transitions. Second operand has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:22:43,360 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:22:48,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:22:48,753 INFO L93 Difference]: Finished difference Result 463 states and 530 transitions. [2021-11-03 22:22:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 22:22:48,754 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-03 22:22:48,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:22:48,755 INFO L225 Difference]: With dead ends: 463 [2021-11-03 22:22:48,755 INFO L226 Difference]: Without dead ends: 321 [2021-11-03 22:22:48,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1155.43ms TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-11-03 22:22:48,756 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 659 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6452.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.54ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6853.31ms IncrementalHoareTripleChecker+Time [2021-11-03 22:22:48,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [659 Valid, 0 Invalid, 1220 Unknown, 0 Unchecked, 10.54ms Time], IncrementalHoareTripleChecker [41 Valid, 1178 Invalid, 1 Unknown, 0 Unchecked, 6853.31ms Time] [2021-11-03 22:22:48,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-11-03 22:22:48,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 199. [2021-11-03 22:22:48,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 193 states have (on average 1.160621761658031) internal successors, (224), 198 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:22:48,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 224 transitions. [2021-11-03 22:22:48,784 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 224 transitions. Word has length 64 [2021-11-03 22:22:48,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:22:48,785 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 224 transitions. [2021-11-03 22:22:48,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.416666666666666) internal successors, (101), 12 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:22:48,785 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 224 transitions. [2021-11-03 22:22:48,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 22:22:48,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:22:48,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:22:48,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-03 22:22:48,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-03 22:22:48,995 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:22:48,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:22:48,996 INFO L85 PathProgramCache]: Analyzing trace with hash -656397129, now seen corresponding path program 1 times [2021-11-03 22:22:48,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-03 22:22:48,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707775505] [2021-11-03 22:22:48,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:22:48,999 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 22:22:48,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-03 22:22:49,000 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 22:22:49,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 22:22:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:22:51,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 1661 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-03 22:22:51,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 22:22:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:22:52,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 22:22:52,903 INFO L354 Elim1Store]: treesize reduction 51, result has 40.0 percent of original size [2021-11-03 22:22:52,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 45 [2021-11-03 22:22:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:22:53,653 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-03 22:22:53,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707775505] [2021-11-03 22:22:53,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707775505] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 22:22:53,654 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:22:53,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-03 22:22:53,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770727305] [2021-11-03 22:22:53,654 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-03 22:22:53,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-03 22:22:53,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-03 22:22:53,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-03 22:22:53,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-03 22:22:53,655 INFO L87 Difference]: Start difference. First operand 199 states and 224 transitions. Second operand has 14 states, 14 states have (on average 7.857142857142857) internal successors, (110), 14 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:22:55,887 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:23:02,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:23:02,525 INFO L93 Difference]: Finished difference Result 336 states and 382 transitions. [2021-11-03 22:23:02,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 22:23:02,526 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.857142857142857) internal successors, (110), 14 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-03 22:23:02,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:23:02,527 INFO L225 Difference]: With dead ends: 336 [2021-11-03 22:23:02,527 INFO L226 Difference]: Without dead ends: 213 [2021-11-03 22:23:02,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1490.06ms TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-11-03 22:23:02,528 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 452 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 21 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7388.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.70ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7915.95ms IncrementalHoareTripleChecker+Time [2021-11-03 22:23:02,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 0 Invalid, 1449 Unknown, 0 Unchecked, 11.70ms Time], IncrementalHoareTripleChecker [21 Valid, 1427 Invalid, 1 Unknown, 0 Unchecked, 7915.95ms Time] [2021-11-03 22:23:02,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-03 22:23:02,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 195. [2021-11-03 22:23:02,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 189 states have (on average 1.1587301587301588) internal successors, (219), 194 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:23:02,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 219 transitions. [2021-11-03 22:23:02,533 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 219 transitions. Word has length 64 [2021-11-03 22:23:02,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:23:02,534 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 219 transitions. [2021-11-03 22:23:02,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.857142857142857) internal successors, (110), 14 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:23:02,534 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 219 transitions. [2021-11-03 22:23:02,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 22:23:02,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:23:02,535 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:23:02,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-03 22:23:02,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-03 22:23:02,755 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:23:02,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:23:02,755 INFO L85 PathProgramCache]: Analyzing trace with hash -795718360, now seen corresponding path program 1 times [2021-11-03 22:23:02,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-03 22:23:02,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607115214] [2021-11-03 22:23:02,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:23:02,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 22:23:02,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-03 22:23:02,759 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 22:23:02,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 22:23:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:23:05,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 1669 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-03 22:23:05,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 22:23:05,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-03 22:23:06,418 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 [2021-11-03 22:23:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:23:06,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 22:23:07,202 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 [2021-11-03 22:23:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:23:07,507 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-03 22:23:07,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607115214] [2021-11-03 22:23:07,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607115214] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 22:23:07,507 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:23:07,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2021-11-03 22:23:07,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938201906] [2021-11-03 22:23:07,507 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-03 22:23:07,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-03 22:23:07,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-03 22:23:07,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-03 22:23:07,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-03 22:23:07,508 INFO L87 Difference]: Start difference. First operand 195 states and 219 transitions. Second operand has 14 states, 14 states have (on average 9.428571428571429) internal successors, (132), 14 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:23:09,722 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:23:15,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:23:15,920 INFO L93 Difference]: Finished difference Result 365 states and 418 transitions. [2021-11-03 22:23:15,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 22:23:15,921 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.428571428571429) internal successors, (132), 14 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-03 22:23:15,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:23:15,922 INFO L225 Difference]: With dead ends: 365 [2021-11-03 22:23:15,922 INFO L226 Difference]: Without dead ends: 260 [2021-11-03 22:23:15,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 983.86ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-11-03 22:23:15,923 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 861 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7397.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.76ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7982.64ms IncrementalHoareTripleChecker+Time [2021-11-03 22:23:15,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 0 Invalid, 1225 Unknown, 0 Unchecked, 15.76ms Time], IncrementalHoareTripleChecker [16 Valid, 1208 Invalid, 1 Unknown, 0 Unchecked, 7982.64ms Time] [2021-11-03 22:23:15,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-03 22:23:15,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 195. [2021-11-03 22:23:15,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 189 states have (on average 1.1534391534391535) internal successors, (218), 194 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:23:15,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 218 transitions. [2021-11-03 22:23:15,929 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 218 transitions. Word has length 70 [2021-11-03 22:23:15,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:23:15,929 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 218 transitions. [2021-11-03 22:23:15,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.428571428571429) internal successors, (132), 14 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:23:15,930 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 218 transitions. [2021-11-03 22:23:15,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-03 22:23:15,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:23:15,930 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:23:15,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 22:23:16,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-03 22:23:16,147 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:23:16,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:23:16,148 INFO L85 PathProgramCache]: Analyzing trace with hash -467038531, now seen corresponding path program 1 times [2021-11-03 22:23:16,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-03 22:23:16,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903466969] [2021-11-03 22:23:16,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:23:16,151 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 22:23:16,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-03 22:23:16,153 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 22:23:16,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 22:23:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:23:18,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 1703 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-03 22:23:18,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 22:23:20,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 22:23:20,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-11-03 22:23:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:23:20,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 22:23:25,631 INFO L354 Elim1Store]: treesize reduction 51, result has 40.0 percent of original size [2021-11-03 22:23:25,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 50 [2021-11-03 22:23:26,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:23:26,488 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-03 22:23:26,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903466969] [2021-11-03 22:23:26,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903466969] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 22:23:26,488 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:23:26,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 10] imperfect sequences [] total 19 [2021-11-03 22:23:26,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199468008] [2021-11-03 22:23:26,489 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-03 22:23:26,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-03 22:23:26,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-03 22:23:26,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-03 22:23:26,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=276, Unknown=1, NotChecked=0, Total=342 [2021-11-03 22:23:26,490 INFO L87 Difference]: Start difference. First operand 195 states and 218 transitions. Second operand has 19 states, 19 states have (on average 7.421052631578948) internal successors, (141), 19 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:23:28,715 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:23:38,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:23:38,246 INFO L93 Difference]: Finished difference Result 310 states and 350 transitions. [2021-11-03 22:23:38,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-03 22:23:38,247 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.421052631578948) internal successors, (141), 19 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-03 22:23:38,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:23:38,248 INFO L225 Difference]: With dead ends: 310 [2021-11-03 22:23:38,248 INFO L226 Difference]: Without dead ends: 201 [2021-11-03 22:23:38,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 6788.75ms TimeCoverageRelationStatistics Valid=191, Invalid=564, Unknown=1, NotChecked=0, Total=756 [2021-11-03 22:23:38,249 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 250 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 1558 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9212.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.83ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1558 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 10085.96ms IncrementalHoareTripleChecker+Time [2021-11-03 22:23:38,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 0 Invalid, 1587 Unknown, 0 Unchecked, 14.83ms Time], IncrementalHoareTripleChecker [26 Valid, 1558 Invalid, 1 Unknown, 2 Unchecked, 10085.96ms Time] [2021-11-03 22:23:38,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-03 22:23:38,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 195. [2021-11-03 22:23:38,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 189 states have (on average 1.1481481481481481) internal successors, (217), 194 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:23:38,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 217 transitions. [2021-11-03 22:23:38,254 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 217 transitions. Word has length 76 [2021-11-03 22:23:38,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:23:38,254 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 217 transitions. [2021-11-03 22:23:38,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.421052631578948) internal successors, (141), 19 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:23:38,254 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 217 transitions. [2021-11-03 22:23:38,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-03 22:23:38,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:23:38,255 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:23:38,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 22:23:38,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-03 22:23:38,468 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:23:38,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:23:38,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1023149089, now seen corresponding path program 1 times [2021-11-03 22:23:38,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-03 22:23:38,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650777187] [2021-11-03 22:23:38,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:23:38,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 22:23:38,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-03 22:23:38,473 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 22:23:38,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 22:23:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:23:40,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 1707 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 22:23:40,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 22:23:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:23:41,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 22:23:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:23:41,856 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-03 22:23:41,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650777187] [2021-11-03 22:23:41,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650777187] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 22:23:41,856 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:23:41,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-03 22:23:41,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578895534] [2021-11-03 22:23:41,856 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-03 22:23:41,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 22:23:41,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-03 22:23:41,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 22:23:41,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 22:23:41,857 INFO L87 Difference]: Start difference. First operand 195 states and 217 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:23:44,074 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:23:45,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:23:45,771 INFO L93 Difference]: Finished difference Result 277 states and 310 transitions. [2021-11-03 22:23:45,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 22:23:45,772 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-03 22:23:45,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:23:45,772 INFO L225 Difference]: With dead ends: 277 [2021-11-03 22:23:45,772 INFO L226 Difference]: Without dead ends: 195 [2021-11-03 22:23:45,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 229.18ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-03 22:23:45,773 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 473 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3512.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.56ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3724.47ms IncrementalHoareTripleChecker+Time [2021-11-03 22:23:45,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 0 Invalid, 343 Unknown, 0 Unchecked, 4.56ms Time], IncrementalHoareTripleChecker [6 Valid, 336 Invalid, 1 Unknown, 0 Unchecked, 3724.47ms Time] [2021-11-03 22:23:45,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-03 22:23:45,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-11-03 22:23:45,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 189 states have (on average 1.1375661375661377) internal successors, (215), 194 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:23:45,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 215 transitions. [2021-11-03 22:23:45,777 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 215 transitions. Word has length 77 [2021-11-03 22:23:45,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:23:45,778 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 215 transitions. [2021-11-03 22:23:45,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:23:45,778 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 215 transitions. [2021-11-03 22:23:45,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-03 22:23:45,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:23:45,779 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:23:45,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-03 22:23:45,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-03 22:23:45,994 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:23:45,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:23:45,994 INFO L85 PathProgramCache]: Analyzing trace with hash 672628, now seen corresponding path program 1 times [2021-11-03 22:23:45,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-03 22:23:45,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788536715] [2021-11-03 22:23:45,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:23:45,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 22:23:45,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-03 22:23:45,998 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 22:23:45,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 22:23:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:23:48,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 1720 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 22:23:48,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 22:23:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:23:48,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 22:23:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:23:48,814 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-03 22:23:48,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788536715] [2021-11-03 22:23:48,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788536715] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 22:23:48,814 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:23:48,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-03 22:23:48,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131220610] [2021-11-03 22:23:48,814 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-03 22:23:48,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 22:23:48,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-03 22:23:48,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 22:23:48,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-03 22:23:48,815 INFO L87 Difference]: Start difference. First operand 195 states and 215 transitions. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:23:51,018 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:23:55,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:23:55,724 INFO L93 Difference]: Finished difference Result 314 states and 350 transitions. [2021-11-03 22:23:55,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 22:23:55,725 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-03 22:23:55,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:23:55,726 INFO L225 Difference]: With dead ends: 314 [2021-11-03 22:23:55,726 INFO L226 Difference]: Without dead ends: 310 [2021-11-03 22:23:55,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 386.49ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-11-03 22:23:55,726 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 314 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6219.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.91ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6594.77ms IncrementalHoareTripleChecker+Time [2021-11-03 22:23:55,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 0 Invalid, 1131 Unknown, 0 Unchecked, 11.91ms Time], IncrementalHoareTripleChecker [46 Valid, 1084 Invalid, 1 Unknown, 0 Unchecked, 6594.77ms Time] [2021-11-03 22:23:55,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-03 22:23:55,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 203. [2021-11-03 22:23:55,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 197 states have (on average 1.131979695431472) internal successors, (223), 202 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:23:55,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 223 transitions. [2021-11-03 22:23:55,731 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 223 transitions. Word has length 83 [2021-11-03 22:23:55,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:23:55,731 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 223 transitions. [2021-11-03 22:23:55,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:23:55,732 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 223 transitions. [2021-11-03 22:23:55,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-03 22:23:55,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:23:55,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:23:55,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 22:23:55,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-03 22:23:55,944 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:23:55,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:23:55,944 INFO L85 PathProgramCache]: Analyzing trace with hash -604435538, now seen corresponding path program 1 times [2021-11-03 22:23:55,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-03 22:23:55,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853646675] [2021-11-03 22:23:55,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:23:55,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 22:23:55,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-03 22:23:55,948 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 22:23:55,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 22:24:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:24:03,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 1726 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-03 22:24:03,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 22:24:04,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 22:24:04,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-11-03 22:24:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:24:05,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 22:24:07,888 INFO L354 Elim1Store]: treesize reduction 51, result has 40.0 percent of original size [2021-11-03 22:24:07,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 50 [2021-11-03 22:24:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:24:08,640 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-03 22:24:08,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853646675] [2021-11-03 22:24:08,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853646675] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 22:24:08,640 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 22:24:08,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 11] imperfect sequences [] total 21 [2021-11-03 22:24:08,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223390101] [2021-11-03 22:24:08,640 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-03 22:24:08,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-03 22:24:08,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-03 22:24:08,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-03 22:24:08,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-11-03 22:24:08,642 INFO L87 Difference]: Start difference. First operand 203 states and 223 transitions. Second operand has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:24:10,852 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-03 22:24:18,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 22:24:18,898 INFO L93 Difference]: Finished difference Result 327 states and 363 transitions. [2021-11-03 22:24:18,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-03 22:24:18,899 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-03 22:24:18,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 22:24:18,900 INFO L225 Difference]: With dead ends: 327 [2021-11-03 22:24:18,900 INFO L226 Difference]: Without dead ends: 210 [2021-11-03 22:24:18,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 4246.86ms TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2021-11-03 22:24:18,901 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 196 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 21 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7807.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.36ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 8474.77ms IncrementalHoareTripleChecker+Time [2021-11-03 22:24:18,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 0 Invalid, 1266 Unknown, 0 Unchecked, 10.36ms Time], IncrementalHoareTripleChecker [21 Valid, 1241 Invalid, 1 Unknown, 3 Unchecked, 8474.77ms Time] [2021-11-03 22:24:18,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-03 22:24:18,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2021-11-03 22:24:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 198 states have (on average 1.1313131313131313) internal successors, (224), 203 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:24:18,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 224 transitions. [2021-11-03 22:24:18,908 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 224 transitions. Word has length 87 [2021-11-03 22:24:18,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 22:24:18,909 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 224 transitions. [2021-11-03 22:24:18,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.285714285714286) internal successors, (153), 21 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 22:24:18,909 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 224 transitions. [2021-11-03 22:24:18,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-03 22:24:18,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-03 22:24:18,910 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 22:24:18,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-03 22:24:19,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-11-03 22:24:19,131 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-03 22:24:19,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 22:24:19,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2111945076, now seen corresponding path program 1 times [2021-11-03 22:24:19,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-03 22:24:19,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234526887] [2021-11-03 22:24:19,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 22:24:19,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 22:24:19,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-11-03 22:24:19,137 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 22:24:19,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 22:26:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 22:26:05,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 1731 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-03 22:26:05,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 22:26:05,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 22:26:05,490 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 22:26:05,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 15 [2021-11-03 22:26:05,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-03 22:26:05,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-03 22:26:07,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 22:26:07,781 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2021-11-03 22:26:08,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 22:26:08,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 22:26:08,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 22:26:08,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 22:26:08,291 INFO L354 Elim1Store]: treesize reduction 146, result has 14.6 percent of original size [2021-11-03 22:26:08,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 50 treesize of output 50 [2021-11-03 22:26:09,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 22:26:09,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 22:26:09,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 22:26:09,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 22:26:09,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 22:26:09,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 22:26:09,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 22:26:09,517 INFO L354 Elim1Store]: treesize reduction 91, result has 7.1 percent of original size [2021-11-03 22:26:09,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 67 treesize of output 64 [2021-11-03 22:26:09,930 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-03 22:26:09,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 46 [2021-11-03 22:26:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 22:26:10,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 22:26:20,262 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 222 treesize of output 198 [2021-11-03 22:28:10,669 WARN L210 SmtUtils]: Spent 1.84m on a formula simplification. DAG size of input: 120 DAG size of output: 101 [2021-11-03 22:28:10,670 INFO L354 Elim1Store]: treesize reduction 167, result has 64.5 percent of original size [2021-11-03 22:28:10,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 470 treesize of output 605 [2021-11-03 22:28:10,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 22:28:10,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 605 treesize of output 609 [2021-11-03 22:28:11,042 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-11-03 22:28:11,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 609 treesize of output 609 [2021-11-03 22:29:15,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-03 22:29:39,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-03 22:30:31,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-03 22:30:38,590 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-11-03 22:30:43,163 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-03 22:30:43,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 27 treesize of output 17 [2021-11-03 22:31:02,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 6 Killed by 15