/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/forester-heap/sll-queue-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:51:38,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:51:38,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:51:38,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:51:38,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:51:38,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:51:38,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:51:38,468 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:51:38,470 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:51:38,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:51:38,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:51:38,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:51:38,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:51:38,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:51:38,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:51:38,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:51:38,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:51:38,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:51:38,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:51:38,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:51:38,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:51:38,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:51:38,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:51:38,502 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:51:38,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:51:38,509 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:51:38,510 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:51:38,511 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:51:38,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:51:38,512 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:51:38,513 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:51:38,513 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:51:38,514 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:51:38,515 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:51:38,516 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:51:38,516 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:51:38,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:51:38,517 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:51:38,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:51:38,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:51:38,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:51:38,520 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:51:38,551 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:51:38,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:51:38,552 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:51:38,552 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:51:38,553 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:51:38,553 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:51:38,553 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:51:38,553 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:51:38,553 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:51:38,554 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:51:38,554 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:51:38,554 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:51:38,555 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:51:38,555 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:51:38,555 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:51:38,555 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:51:38,555 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:51:38,555 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:51:38,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:51:38,556 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:51:38,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:51:38,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:51:38,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:51:38,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:51:38,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:51:38,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:51:38,557 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:51:38,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:51:38,557 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:51:38,557 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:51:38,557 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:51:38,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:51:38,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:51:38,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:51:38,558 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:51:38,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:51:38,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:51:38,558 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:51:38,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:51:38,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:51:38,559 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:51:38,559 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:51:38,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:51:38,849 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:51:38,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:51:38,855 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:51:38,856 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:51:38,857 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-queue-2.i [2023-04-01 04:51:40,041 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:51:40,265 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:51:40,266 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i [2023-04-01 04:51:40,279 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7ed1fa97/95e0e34820cf4ce1b3ffde150ec0dd44/FLAG01b854005 [2023-04-01 04:51:40,293 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7ed1fa97/95e0e34820cf4ce1b3ffde150ec0dd44 [2023-04-01 04:51:40,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:51:40,297 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:51:40,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:51:40,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:51:40,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:51:40,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:51:40" (1/1) ... [2023-04-01 04:51:40,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@80c0e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:40, skipping insertion in model container [2023-04-01 04:51:40,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:51:40" (1/1) ... [2023-04-01 04:51:40,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:51:40,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:51:40,609 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[22387,22400] [2023-04-01 04:51:40,614 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[22458,22471] [2023-04-01 04:51:40,615 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[22532,22545] [2023-04-01 04:51:40,618 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[22624,22637] [2023-04-01 04:51:40,619 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[22701,22714] [2023-04-01 04:51:40,620 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[22796,22809] [2023-04-01 04:51:40,620 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[22873,22886] [2023-04-01 04:51:40,621 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[22956,22969] [2023-04-01 04:51:40,622 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[23051,23064] [2023-04-01 04:51:40,622 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[23128,23141] [2023-04-01 04:51:40,623 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[23211,23224] [2023-04-01 04:51:40,624 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[23300,23313] [2023-04-01 04:51:40,625 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[23386,23399] [2023-04-01 04:51:40,626 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[23532,23545] [2023-04-01 04:51:40,634 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:51:40,646 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:51:40,686 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[22387,22400] [2023-04-01 04:51:40,687 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[22458,22471] [2023-04-01 04:51:40,688 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[22532,22545] [2023-04-01 04:51:40,688 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[22624,22637] [2023-04-01 04:51:40,689 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[22701,22714] [2023-04-01 04:51:40,689 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[22796,22809] [2023-04-01 04:51:40,690 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[22873,22886] [2023-04-01 04:51:40,690 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[22956,22969] [2023-04-01 04:51:40,691 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[23051,23064] [2023-04-01 04:51:40,691 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[23128,23141] [2023-04-01 04:51:40,692 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[23211,23224] [2023-04-01 04:51:40,692 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[23300,23313] [2023-04-01 04:51:40,693 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[23386,23399] [2023-04-01 04:51:40,694 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-queue-2.i[23532,23545] [2023-04-01 04:51:40,696 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:51:40,717 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:51:40,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:40 WrapperNode [2023-04-01 04:51:40,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:51:40,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:51:40,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:51:40,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:51:40,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:40" (1/1) ... [2023-04-01 04:51:40,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:40" (1/1) ... [2023-04-01 04:51:40,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:40" (1/1) ... [2023-04-01 04:51:40,739 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:40" (1/1) ... [2023-04-01 04:51:40,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:40" (1/1) ... [2023-04-01 04:51:40,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:40" (1/1) ... [2023-04-01 04:51:40,765 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:40" (1/1) ... [2023-04-01 04:51:40,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:40" (1/1) ... [2023-04-01 04:51:40,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:51:40,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:51:40,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:51:40,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:51:40,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:40" (1/1) ... [2023-04-01 04:51:40,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:51:40,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:51:40,810 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) [2023-04-01 04:51:40,818 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 [2023-04-01 04:51:40,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:51:40,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:51:40,847 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:51:40,847 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:51:40,847 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-01 04:51:40,848 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-01 04:51:40,848 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-01 04:51:40,848 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-01 04:51:40,848 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-01 04:51:40,848 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-01 04:51:40,848 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-01 04:51:40,848 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-01 04:51:40,849 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-01 04:51:40,849 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-01 04:51:40,849 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-01 04:51:40,850 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-01 04:51:40,850 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-01 04:51:40,851 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-01 04:51:40,851 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-01 04:51:40,852 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-01 04:51:40,852 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-01 04:51:40,852 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-01 04:51:40,852 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-01 04:51:40,854 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-01 04:51:40,854 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-01 04:51:40,854 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-01 04:51:40,854 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-01 04:51:40,854 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-01 04:51:40,855 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-01 04:51:40,855 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-01 04:51:40,856 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-01 04:51:40,856 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-01 04:51:40,856 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-01 04:51:40,857 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-01 04:51:40,858 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-01 04:51:40,858 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-01 04:51:40,858 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-01 04:51:40,858 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-01 04:51:40,858 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-01 04:51:40,858 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-01 04:51:40,858 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-01 04:51:40,858 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-01 04:51:40,859 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-01 04:51:40,859 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-01 04:51:40,859 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-01 04:51:40,859 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-01 04:51:40,859 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-01 04:51:40,859 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-01 04:51:40,859 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-01 04:51:40,859 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-01 04:51:40,859 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-01 04:51:40,860 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-01 04:51:40,860 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-01 04:51:40,861 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-01 04:51:40,861 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 04:51:40,861 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 04:51:40,861 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-01 04:51:40,861 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 04:51:40,862 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-01 04:51:40,862 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-01 04:51:40,862 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-01 04:51:40,862 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-01 04:51:40,862 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-01 04:51:40,862 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:51:40,862 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-01 04:51:40,862 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-01 04:51:40,862 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-01 04:51:40,863 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:51:40,863 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-01 04:51:40,863 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-01 04:51:40,863 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-01 04:51:40,863 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-01 04:51:40,863 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-01 04:51:40,863 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-01 04:51:40,863 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-01 04:51:40,863 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-01 04:51:40,863 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-01 04:51:40,864 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-01 04:51:40,864 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-01 04:51:40,864 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-01 04:51:40,864 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-01 04:51:40,864 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-01 04:51:40,864 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-01 04:51:40,865 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-01 04:51:40,865 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-01 04:51:40,865 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-01 04:51:40,865 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-01 04:51:40,865 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-01 04:51:40,865 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-01 04:51:40,865 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-01 04:51:40,866 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-01 04:51:40,866 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-01 04:51:40,866 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-01 04:51:40,866 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-01 04:51:40,866 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-01 04:51:40,867 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-01 04:51:40,869 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-01 04:51:40,869 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-01 04:51:40,875 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-01 04:51:40,875 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-01 04:51:40,875 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-01 04:51:40,875 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-01 04:51:40,876 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-01 04:51:40,876 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-01 04:51:40,876 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-01 04:51:40,876 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-01 04:51:40,876 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-01 04:51:40,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:51:40,876 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:51:40,876 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 04:51:40,876 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 04:51:40,876 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:51:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:51:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:51:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 04:51:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 04:51:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:51:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 04:51:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:51:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:51:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:51:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:51:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:51:41,152 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:51:41,153 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:51:41,496 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:51:41,542 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:51:41,542 INFO L302 CfgBuilder]: Removed 31 assume(true) statements. [2023-04-01 04:51:41,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:51:41 BoogieIcfgContainer [2023-04-01 04:51:41,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:51:41,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:51:41,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:51:41,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:51:41,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:51:40" (1/3) ... [2023-04-01 04:51:41,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1676e478 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:51:41, skipping insertion in model container [2023-04-01 04:51:41,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:51:40" (2/3) ... [2023-04-01 04:51:41,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1676e478 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:51:41, skipping insertion in model container [2023-04-01 04:51:41,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:51:41" (3/3) ... [2023-04-01 04:51:41,553 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-queue-2.i [2023-04-01 04:51:41,569 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:51:41,569 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-04-01 04:51:41,607 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:51:41,613 INFO L357 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=FINITE_AUTOMATA, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@9e2b985, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:51:41,614 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2023-04-01 04:51:41,622 INFO L276 IsEmpty]: Start isEmpty. Operand has 82 states, 63 states have (on average 2.015873015873016) internal successors, (127), 77 states have internal predecessors, (127), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:51:41,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-04-01 04:51:41,628 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:41,629 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:41,630 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2023-04-01 04:51:41,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:41,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1606316518, now seen corresponding path program 1 times [2023-04-01 04:51:41,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:41,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608680267] [2023-04-01 04:51:41,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:41,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:41,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:41,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608680267] [2023-04-01 04:51:41,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608680267] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:51:41,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:51:41,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 04:51:41,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996951755] [2023-04-01 04:51:41,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:51:41,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 04:51:41,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:41,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 04:51:41,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 04:51:41,865 INFO L87 Difference]: Start difference. First operand has 82 states, 63 states have (on average 2.015873015873016) internal successors, (127), 77 states have internal predecessors, (127), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:41,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:41,902 INFO L93 Difference]: Finished difference Result 159 states and 257 transitions. [2023-04-01 04:51:41,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 04:51:41,905 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-04-01 04:51:41,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:41,912 INFO L225 Difference]: With dead ends: 159 [2023-04-01 04:51:41,912 INFO L226 Difference]: Without dead ends: 78 [2023-04-01 04:51:41,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 04:51:41,919 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:41,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:51:41,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-04-01 04:51:41,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-04-01 04:51:41,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 61 states have (on average 1.2950819672131149) internal successors, (79), 74 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:41,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2023-04-01 04:51:41,953 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 8 [2023-04-01 04:51:41,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:41,953 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2023-04-01 04:51:41,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:41,954 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2023-04-01 04:51:41,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-04-01 04:51:41,954 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:41,954 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:41,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:51:41,955 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2023-04-01 04:51:41,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:41,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1745551194, now seen corresponding path program 1 times [2023-04-01 04:51:41,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:41,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483062858] [2023-04-01 04:51:41,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:41,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:42,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:42,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483062858] [2023-04-01 04:51:42,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483062858] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:51:42,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:51:42,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:51:42,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111716910] [2023-04-01 04:51:42,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:51:42,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:51:42,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:42,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:51:42,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:51:42,026 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:42,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:42,112 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2023-04-01 04:51:42,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:51:42,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-04-01 04:51:42,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:42,115 INFO L225 Difference]: With dead ends: 78 [2023-04-01 04:51:42,116 INFO L226 Difference]: Without dead ends: 68 [2023-04-01 04:51:42,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:51:42,117 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 65 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:42,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 58 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:51:42,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-04-01 04:51:42,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-04-01 04:51:42,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 64 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:42,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2023-04-01 04:51:42,135 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 9 [2023-04-01 04:51:42,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:42,135 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2023-04-01 04:51:42,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:42,137 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2023-04-01 04:51:42,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:51:42,138 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:42,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:42,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:51:42,139 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2023-04-01 04:51:42,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:42,140 INFO L85 PathProgramCache]: Analyzing trace with hash -2113382710, now seen corresponding path program 1 times [2023-04-01 04:51:42,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:42,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14057857] [2023-04-01 04:51:42,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:42,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:42,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:42,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:42,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14057857] [2023-04-01 04:51:42,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14057857] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:51:42,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:51:42,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:51:42,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962083567] [2023-04-01 04:51:42,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:51:42,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:51:42,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:42,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:51:42,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:51:42,327 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:42,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:42,370 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2023-04-01 04:51:42,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:51:42,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:51:42,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:42,374 INFO L225 Difference]: With dead ends: 68 [2023-04-01 04:51:42,374 INFO L226 Difference]: Without dead ends: 66 [2023-04-01 04:51:42,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:51:42,375 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 53 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:42,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 73 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:51:42,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-04-01 04:51:42,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-04-01 04:51:42,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 62 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:42,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2023-04-01 04:51:42,388 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 11 [2023-04-01 04:51:42,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:42,388 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2023-04-01 04:51:42,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:42,388 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2023-04-01 04:51:42,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 04:51:42,389 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:42,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:42,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:51:42,389 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2023-04-01 04:51:42,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:42,390 INFO L85 PathProgramCache]: Analyzing trace with hash 236772091, now seen corresponding path program 1 times [2023-04-01 04:51:42,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:42,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326201218] [2023-04-01 04:51:42,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:42,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:42,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:42,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:42,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326201218] [2023-04-01 04:51:42,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326201218] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:51:42,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:51:42,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:51:42,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730469423] [2023-04-01 04:51:42,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:51:42,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:51:42,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:42,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:51:42,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:51:42,478 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:42,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:42,550 INFO L93 Difference]: Finished difference Result 134 states and 144 transitions. [2023-04-01 04:51:42,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:51:42,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-01 04:51:42,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:42,552 INFO L225 Difference]: With dead ends: 134 [2023-04-01 04:51:42,552 INFO L226 Difference]: Without dead ends: 82 [2023-04-01 04:51:42,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:51:42,553 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 12 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:42,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 122 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:51:42,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-04-01 04:51:42,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2023-04-01 04:51:42,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 69 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:42,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2023-04-01 04:51:42,563 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 15 [2023-04-01 04:51:42,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:42,564 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2023-04-01 04:51:42,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:42,564 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2023-04-01 04:51:42,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 04:51:42,565 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:42,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:42,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:51:42,565 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr13ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2023-04-01 04:51:42,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:42,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1906265982, now seen corresponding path program 1 times [2023-04-01 04:51:42,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:42,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094805130] [2023-04-01 04:51:42,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:42,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:42,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:42,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:42,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094805130] [2023-04-01 04:51:42,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094805130] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:51:42,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:51:42,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 04:51:42,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126847975] [2023-04-01 04:51:42,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:51:42,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 04:51:42,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:42,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 04:51:42,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 04:51:42,683 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:42,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:42,747 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2023-04-01 04:51:42,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 04:51:42,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-04-01 04:51:42,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:42,750 INFO L225 Difference]: With dead ends: 82 [2023-04-01 04:51:42,753 INFO L226 Difference]: Without dead ends: 68 [2023-04-01 04:51:42,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:51:42,754 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 4 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:42,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 182 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:51:42,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-04-01 04:51:42,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-04-01 04:51:42,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 64 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:42,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2023-04-01 04:51:42,762 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 18 [2023-04-01 04:51:42,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:42,762 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2023-04-01 04:51:42,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:42,762 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2023-04-01 04:51:42,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:51:42,763 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:42,763 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:42,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 04:51:42,763 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2023-04-01 04:51:42,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:42,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1604248966, now seen corresponding path program 1 times [2023-04-01 04:51:42,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:42,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631839482] [2023-04-01 04:51:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:42,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:43,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:43,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631839482] [2023-04-01 04:51:43,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631839482] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:51:43,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330655937] [2023-04-01 04:51:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:43,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:51:43,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:51:43,207 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) [2023-04-01 04:51:43,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:51:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:43,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 04:51:43,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:51:43,451 INFO L350 Elim1Store]: Elim1 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 [2023-04-01 04:51:43,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-04-01 04:51:43,579 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-01 04:51:43,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2023-04-01 04:51:43,592 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-04-01 04:51:43,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 treesize of output 15 [2023-04-01 04:51:43,705 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 12 [2023-04-01 04:51:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:43,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:51:43,849 INFO L321 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-04-01 04:51:43,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 165 treesize of output 176 [2023-04-01 04:51:43,927 INFO L321 Elim1Store]: treesize reduction 20, result has 63.6 percent of original size [2023-04-01 04:51:43,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 135 treesize of output 170 [2023-04-01 04:51:43,977 INFO L321 Elim1Store]: treesize reduction 22, result has 45.0 percent of original size [2023-04-01 04:51:43,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 135 treesize of output 141 [2023-04-01 04:51:44,019 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:51:44,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2023-04-01 04:51:44,225 INFO L350 Elim1Store]: Elim1 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 38 treesize of output 28 [2023-04-01 04:51:44,280 INFO L321 Elim1Store]: treesize reduction 100, result has 30.6 percent of original size [2023-04-01 04:51:44,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 122 treesize of output 167 [2023-04-01 04:51:44,312 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:51:44,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 17 [2023-04-01 04:51:44,367 INFO L321 Elim1Store]: treesize reduction 61, result has 24.7 percent of original size [2023-04-01 04:51:44,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 98 [2023-04-01 04:51:44,495 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 4 [2023-04-01 04:51:44,505 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 4 [2023-04-01 04:51:44,525 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 4 [2023-04-01 04:51:44,602 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:51:44,603 INFO L350 Elim1Store]: Elim1 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 212 treesize of output 192 [2023-04-01 04:51:44,670 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 4 [2023-04-01 04:51:44,712 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 4 [2023-04-01 04:51:44,840 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:51:44,841 INFO L350 Elim1Store]: Elim1 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 44 treesize of output 44 [2023-04-01 04:51:44,882 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 4 [2023-04-01 04:51:44,886 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 4 [2023-04-01 04:51:44,899 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:51:44,900 INFO L350 Elim1Store]: Elim1 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 40 treesize of output 40 [2023-04-01 04:51:44,940 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 4 [2023-04-01 04:51:44,951 INFO L350 Elim1Store]: Elim1 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 40 treesize of output 34 [2023-04-01 04:51:44,956 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 22 [2023-04-01 04:51:44,970 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 04:51:45,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:45,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330655937] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:51:45,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [49984274] [2023-04-01 04:51:45,100 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 04:51:45,100 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:51:45,104 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:51:45,108 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:51:45,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:51:45,162 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:51:45,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:51:45,496 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:51:45,954 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1349#(and (<= 1 |#StackHeapBarrier|) (= main_~head~0.offset 0) (<= (+ main_~item~0.base 1) |#StackHeapBarrier|) (<= (+ main_~head~0.base 1) |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| main_~head~0.base) 0) 0) (= main_~item~0.offset 0) (not (= main_~head~0.base 0)) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.base| main_~head~0.base) 0) 0) (= main_~status~0 1) (= |#NULL.base| 0))' at error location [2023-04-01 04:51:45,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:51:45,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:51:45,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2023-04-01 04:51:45,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544170089] [2023-04-01 04:51:45,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:51:45,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 04:51:45,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:45,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 04:51:45,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-04-01 04:51:45,956 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:46,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:46,131 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2023-04-01 04:51:46,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:51:46,132 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-01 04:51:46,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:46,133 INFO L225 Difference]: With dead ends: 137 [2023-04-01 04:51:46,133 INFO L226 Difference]: Without dead ends: 135 [2023-04-01 04:51:46,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2023-04-01 04:51:46,135 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 176 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:46,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 200 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:51:46,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-04-01 04:51:46,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 81. [2023-04-01 04:51:46,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 70 states have (on average 1.2) internal successors, (84), 77 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:46,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2023-04-01 04:51:46,145 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 21 [2023-04-01 04:51:46,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:46,146 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2023-04-01 04:51:46,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:46,146 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2023-04-01 04:51:46,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 04:51:46,147 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:46,147 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:46,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 04:51:46,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 04:51:46,354 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr6ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2023-04-01 04:51:46,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:46,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1490179872, now seen corresponding path program 1 times [2023-04-01 04:51:46,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:46,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167512649] [2023-04-01 04:51:46,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:46,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:46,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:46,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167512649] [2023-04-01 04:51:46,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167512649] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:51:46,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37588208] [2023-04-01 04:51:46,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:46,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:51:46,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:51:46,462 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:51:46,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:51:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:46,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:51:46,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:51:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:46,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:51:46,714 INFO L321 Elim1Store]: treesize reduction 20, result has 63.6 percent of original size [2023-04-01 04:51:46,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 150 [2023-04-01 04:51:46,749 INFO L321 Elim1Store]: treesize reduction 20, result has 63.6 percent of original size [2023-04-01 04:51:46,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 91 treesize of output 132 [2023-04-01 04:51:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:46,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37588208] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:51:46,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [508760276] [2023-04-01 04:51:46,813 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 04:51:46,814 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:51:46,814 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:51:46,814 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:51:46,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:51:46,838 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:51:47,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:51:47,064 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:51:47,525 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1783#(and (<= 1 |#StackHeapBarrier|) (= main_~head~0.offset 0) (<= (+ main_~item~0.base 1) |#StackHeapBarrier|) (= main_~status~0 2) (<= (+ main_~head~0.base 1) |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| main_~head~0.base) 0) 0) (= main_~item~0.offset 0) (not (= main_~head~0.base 0)) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.base| main_~head~0.base) 0) 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:51:47,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:51:47,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:51:47,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-04-01 04:51:47,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681036915] [2023-04-01 04:51:47,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:51:47,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 04:51:47,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:47,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 04:51:47,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-04-01 04:51:47,527 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:47,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:47,576 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2023-04-01 04:51:47,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 04:51:47,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-04-01 04:51:47,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:47,577 INFO L225 Difference]: With dead ends: 137 [2023-04-01 04:51:47,577 INFO L226 Difference]: Without dead ends: 92 [2023-04-01 04:51:47,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-04-01 04:51:47,578 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 19 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:47,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 175 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:51:47,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-04-01 04:51:47,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2023-04-01 04:51:47,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 79 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:47,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2023-04-01 04:51:47,587 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 22 [2023-04-01 04:51:47,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:47,587 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2023-04-01 04:51:47,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:47,588 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2023-04-01 04:51:47,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 04:51:47,588 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:47,589 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:47,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 04:51:47,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-04-01 04:51:47,795 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr4ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2023-04-01 04:51:47,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:47,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1091331119, now seen corresponding path program 2 times [2023-04-01 04:51:47,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:47,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20970236] [2023-04-01 04:51:47,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:47,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:47,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:47,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20970236] [2023-04-01 04:51:47,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20970236] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:51:47,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708573880] [2023-04-01 04:51:47,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 04:51:47,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:51:47,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:51:47,957 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:51:47,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 04:51:48,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 04:51:48,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:51:48,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:51:48,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:51:48,152 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-04-01 04:51:48,152 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-04-01 04:51:48,164 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-04-01 04:51:48,164 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-04-01 04:51:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:48,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:51:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:48,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708573880] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:51:48,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1421599580] [2023-04-01 04:51:48,223 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 04:51:48,223 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:51:48,224 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:51:48,224 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:51:48,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:51:48,239 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:51:48,486 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:51:48,490 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:51:48,915 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2249#(and (<= 1 |#StackHeapBarrier|) (= main_~head~0.offset 0) (<= (+ main_~item~0.base 1) |#StackHeapBarrier|) (<= (+ main_~head~0.base 1) |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| main_~head~0.base) 0) 0) (= main_~item~0.offset 0) (not (= main_~head~0.base 0)) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.base| main_~head~0.base) 0) 0) (= main_~status~0 1) (= |#NULL.base| 0))' at error location [2023-04-01 04:51:48,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:51:48,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:51:48,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-04-01 04:51:48,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788007953] [2023-04-01 04:51:48,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:51:48,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 04:51:48,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:48,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 04:51:48,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-04-01 04:51:48,918 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:49,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:49,028 INFO L93 Difference]: Finished difference Result 147 states and 157 transitions. [2023-04-01 04:51:49,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:51:49,029 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-04-01 04:51:49,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:49,030 INFO L225 Difference]: With dead ends: 147 [2023-04-01 04:51:49,030 INFO L226 Difference]: Without dead ends: 106 [2023-04-01 04:51:49,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-04-01 04:51:49,031 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 132 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:49,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 285 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:51:49,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-04-01 04:51:49,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2023-04-01 04:51:49,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 77 states have (on average 1.155844155844156) internal successors, (89), 83 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:49,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2023-04-01 04:51:49,039 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 27 [2023-04-01 04:51:49,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:49,040 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2023-04-01 04:51:49,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:49,040 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2023-04-01 04:51:49,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 04:51:49,041 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:49,041 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:49,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 04:51:49,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:51:49,249 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr6ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2023-04-01 04:51:49,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:49,249 INFO L85 PathProgramCache]: Analyzing trace with hash 846183413, now seen corresponding path program 2 times [2023-04-01 04:51:49,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:49,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075147075] [2023-04-01 04:51:49,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:49,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:49,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:49,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075147075] [2023-04-01 04:51:49,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075147075] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:51:49,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371102776] [2023-04-01 04:51:49,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 04:51:49,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:51:49,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:51:49,745 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:51:49,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 04:51:49,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 04:51:49,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:51:49,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 34 conjunts are in the unsatisfiable core [2023-04-01 04:51:49,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:51:49,964 INFO L350 Elim1Store]: Elim1 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 [2023-04-01 04:51:50,009 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-01 04:51:50,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-01 04:51:50,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-04-01 04:51:50,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-01 04:51:50,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-04-01 04:51:50,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:51:50,139 INFO L321 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2023-04-01 04:51:50,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 40 [2023-04-01 04:51:50,154 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2023-04-01 04:51:50,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-04-01 04:51:50,272 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 12 [2023-04-01 04:51:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:50,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:51:50,398 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:51:50,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-04-01 04:51:50,407 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:51:50,407 INFO L350 Elim1Store]: Elim1 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 95 treesize of output 82 [2023-04-01 04:51:50,413 INFO L350 Elim1Store]: Elim1 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 52 treesize of output 48 [2023-04-01 04:51:50,418 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 46 [2023-04-01 04:51:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:50,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371102776] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:51:50,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [695446485] [2023-04-01 04:51:50,586 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 04:51:50,587 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:51:50,587 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:51:50,587 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:51:50,587 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:51:50,602 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:51:50,834 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:51:50,840 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:51:51,339 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2749#(and (<= 1 |#StackHeapBarrier|) (= main_~head~0.offset 0) (<= (+ main_~item~0.base 1) |#StackHeapBarrier|) (= main_~status~0 2) (<= (+ main_~head~0.base 1) |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| main_~head~0.base) 0) 0) (= main_~item~0.offset 0) (not (= main_~head~0.base 0)) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.base| main_~head~0.base) 0) 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:51:51,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:51:51,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:51:51,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-04-01 04:51:51,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593204178] [2023-04-01 04:51:51,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:51:51,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 04:51:51,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:51,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 04:51:51,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2023-04-01 04:51:51,342 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:51,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:51,847 INFO L93 Difference]: Finished difference Result 142 states and 148 transitions. [2023-04-01 04:51:51,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 04:51:51,847 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-04-01 04:51:51,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:51,848 INFO L225 Difference]: With dead ends: 142 [2023-04-01 04:51:51,848 INFO L226 Difference]: Without dead ends: 140 [2023-04-01 04:51:51,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 04:51:51,849 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 251 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:51,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 385 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 270 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 04:51:51,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-04-01 04:51:51,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 85. [2023-04-01 04:51:51,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 76 states have (on average 1.144736842105263) internal successors, (87), 81 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:51,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2023-04-01 04:51:51,862 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 28 [2023-04-01 04:51:51,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:51,862 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2023-04-01 04:51:51,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:51,862 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2023-04-01 04:51:51,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 04:51:51,863 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:51,863 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:51,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 04:51:52,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:51:52,071 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr13ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2023-04-01 04:51:52,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:52,071 INFO L85 PathProgramCache]: Analyzing trace with hash -977239794, now seen corresponding path program 1 times [2023-04-01 04:51:52,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:52,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347931994] [2023-04-01 04:51:52,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:52,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:52,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:52,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347931994] [2023-04-01 04:51:52,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347931994] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:51:52,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75802209] [2023-04-01 04:51:52,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:52,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:51:52,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:51:52,609 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:51:52,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 04:51:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:52,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 42 conjunts are in the unsatisfiable core [2023-04-01 04:51:52,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:51:52,782 INFO L350 Elim1Store]: Elim1 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 [2023-04-01 04:51:52,816 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-04-01 04:51:52,821 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 18 [2023-04-01 04:51:52,831 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-01 04:51:52,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 46 [2023-04-01 04:51:52,843 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2023-04-01 04:51:52,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2023-04-01 04:51:52,848 INFO L350 Elim1Store]: Elim1 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 5 treesize of output 3 [2023-04-01 04:51:52,854 INFO L350 Elim1Store]: Elim1 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 11 [2023-04-01 04:51:52,862 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-04-01 04:51:52,863 INFO L350 Elim1Store]: Elim1 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 [2023-04-01 04:51:53,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-04-01 04:51:53,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2023-04-01 04:51:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:53,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:51:53,314 INFO L321 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-04-01 04:51:53,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 185 treesize of output 201 [2023-04-01 04:51:53,357 INFO L321 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-04-01 04:51:53,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 155 treesize of output 171 [2023-04-01 04:51:53,396 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:51:53,396 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 174 [2023-04-01 04:51:53,435 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:51:53,435 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 219 treesize of output 201 [2023-04-01 04:51:53,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:51:53,488 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 9 treesize of output 8 [2023-04-01 04:51:53,528 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:51:53,528 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 9 treesize of output 8 [2023-04-01 04:51:53,545 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:51:53,546 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 16 treesize of output 10 [2023-04-01 04:51:53,573 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:51:53,574 INFO L350 Elim1Store]: Elim1 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 175 treesize of output 176 [2023-04-01 04:51:53,780 INFO L350 Elim1Store]: Elim1 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 2428 treesize of output 2396 [2023-04-01 04:51:53,812 INFO L350 Elim1Store]: Elim1 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 2722 treesize of output 2690 [2023-04-01 04:51:53,833 INFO L350 Elim1Store]: Elim1 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 154 treesize of output 150 [2023-04-01 04:51:53,840 INFO L350 Elim1Store]: Elim1 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 150 treesize of output 146 [2023-04-01 04:51:53,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:51:53,948 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 51 [2023-04-01 04:51:53,986 INFO L350 Elim1Store]: Elim1 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 40 treesize of output 36 [2023-04-01 04:51:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:54,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75802209] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:51:54,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [109477341] [2023-04-01 04:51:54,070 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-04-01 04:51:54,070 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:51:54,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:51:54,070 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:51:54,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:51:54,085 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:51:54,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:51:54,334 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:51:55,065 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3255#(and (<= 1 |#StackHeapBarrier|) (= main_~head~0.offset 0) (<= (+ main_~head~0.base 1) |#StackHeapBarrier|) (not (= main_~head~0.base 0)) (or (not (= (select (select |#memory_$Pointer$.offset| main_~head~0.base) 0) 0)) (not (= (select (select |#memory_$Pointer$.base| main_~head~0.base) 0) 0))) (= |#NULL.offset| 0) (= main_~item~0.base (select (select |#memory_$Pointer$.base| main_~head~0.base) 0)) (<= (select (select |#memory_int| main_~item~0.base) (+ 4 main_~item~0.offset)) 0) (= (select (select |#memory_$Pointer$.offset| main_~head~0.base) 0) main_~item~0.offset) (= main_~status~0 1) (= |#NULL.base| 0))' at error location [2023-04-01 04:51:55,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:51:55,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:51:55,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2023-04-01 04:51:55,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82397171] [2023-04-01 04:51:55,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:51:55,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 04:51:55,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:51:55,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 04:51:55,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2023-04-01 04:51:55,068 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:55,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:51:55,344 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2023-04-01 04:51:55,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:51:55,345 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-04-01 04:51:55,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:51:55,346 INFO L225 Difference]: With dead ends: 115 [2023-04-01 04:51:55,346 INFO L226 Difference]: Without dead ends: 113 [2023-04-01 04:51:55,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 04:51:55,347 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 89 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:51:55,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 364 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:51:55,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-04-01 04:51:55,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 91. [2023-04-01 04:51:55,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 87 states have internal predecessors, (93), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:55,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2023-04-01 04:51:55,361 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 29 [2023-04-01 04:51:55,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:51:55,362 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2023-04-01 04:51:55,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:51:55,362 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2023-04-01 04:51:55,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 04:51:55,363 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:51:55,363 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:51:55,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 04:51:55,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 04:51:55,569 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr7ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION (and 10 more)] === [2023-04-01 04:51:55,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:51:55,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1491070966, now seen corresponding path program 1 times [2023-04-01 04:51:55,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:51:55,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980874565] [2023-04-01 04:51:55,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:55,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:51:55,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:56,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:51:56,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980874565] [2023-04-01 04:51:56,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980874565] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:51:56,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844564969] [2023-04-01 04:51:56,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:51:56,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:51:56,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:51:56,313 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:51:56,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 04:51:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:51:56,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 54 conjunts are in the unsatisfiable core [2023-04-01 04:51:56,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:51:56,501 INFO L350 Elim1Store]: Elim1 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 [2023-04-01 04:51:56,532 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-04-01 04:51:56,542 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-04-01 04:51:56,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-04-01 04:51:56,561 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-01 04:51:56,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-01 04:51:56,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-04-01 04:51:56,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-04-01 04:51:56,700 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-04-01 04:51:56,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2023-04-01 04:51:56,720 INFO L321 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2023-04-01 04:51:56,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 65 [2023-04-01 04:51:56,743 INFO L321 Elim1Store]: treesize reduction 44, result has 49.4 percent of original size [2023-04-01 04:51:56,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 61 [2023-04-01 04:51:56,768 INFO L321 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2023-04-01 04:51:56,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 38 [2023-04-01 04:51:57,009 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-01 04:51:57,010 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 23 [2023-04-01 04:51:57,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2023-04-01 04:51:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:51:57,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:51:57,578 INFO L321 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-04-01 04:51:57,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 180 treesize of output 196 [2023-04-01 04:51:57,608 INFO L321 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-04-01 04:51:57,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 150 treesize of output 166 [2023-04-01 04:51:57,672 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:51:57,673 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 187 treesize of output 169 [2023-04-01 04:51:57,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:51:57,709 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 196 [2023-04-01 04:51:57,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:51:57,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 80 [2023-04-01 04:51:57,902 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:51:57,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 80 [2023-04-01 04:51:57,937 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:51:57,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 80 [2023-04-01 04:51:58,069 INFO L350 Elim1Store]: Elim1 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 843153 treesize of output 841609