/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:12:04,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:12:04,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:12:04,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:12:04,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:12:04,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:12:04,930 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:12:04,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:12:04,932 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:12:04,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:12:04,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:12:04,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:12:04,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:12:04,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:12:04,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:12:04,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:12:04,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:12:04,942 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:12:04,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:12:04,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:12:04,948 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:12:04,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:12:04,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:12:04,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:12:04,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:12:04,956 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:12:04,956 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:12:04,957 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:12:04,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:12:04,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:12:04,958 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:12:04,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:12:04,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:12:04,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:12:04,960 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:12:04,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:12:04,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:12:04,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:12:04,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:12:04,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:12:04,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:12:04,963 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 [2023-03-31 22:12:04,986 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:12:04,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:12:04,986 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:12:04,986 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:12:04,987 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:12:04,987 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:12:04,987 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:12:04,987 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:12:04,987 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:12:04,988 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:12:04,988 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:12:04,988 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:12:04,988 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:12:04,988 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:12:04,989 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:12:04,989 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:12:04,989 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:12:04,989 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:12:04,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:12:04,989 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:12:04,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:12:04,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:12:04,990 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:12:04,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:12:04,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:12:04,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:12:04,990 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:12:04,990 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:12:04,990 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:12:04,990 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:12:04,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:12:04,991 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:12:04,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:12:04,991 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:12:04,991 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:12:04,991 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:12:04,991 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:12:04,991 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:12:04,991 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:12:04,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:12:04,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:12:04,992 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:12:05,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:12:05,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:12:05,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:12:05,155 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:12:05,155 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:12:05,156 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label22.c [2023-03-31 22:12:06,062 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:12:06,354 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:12:06,354 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label22.c [2023-03-31 22:12:06,368 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9aa8ebaa8/bd50b625c8094cf3bc8f71aa841d54ae/FLAGbb860e877 [2023-03-31 22:12:06,658 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9aa8ebaa8/bd50b625c8094cf3bc8f71aa841d54ae [2023-03-31 22:12:06,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:12:06,661 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:12:06,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:12:06,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:12:06,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:12:06,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:12:06" (1/1) ... [2023-03-31 22:12:06,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7149098e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:06, skipping insertion in model container [2023-03-31 22:12:06,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:12:06" (1/1) ... [2023-03-31 22:12:06,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:12:06,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:12:06,865 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/eca-rers2012/Problem15_label22.c[2348,2361] [2023-03-31 22:12:07,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:12:07,129 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:12:07,144 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/eca-rers2012/Problem15_label22.c[2348,2361] [2023-03-31 22:12:07,326 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:12:07,340 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:12:07,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:07 WrapperNode [2023-03-31 22:12:07,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:12:07,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:12:07,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:12:07,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:12:07,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:07" (1/1) ... [2023-03-31 22:12:07,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:07" (1/1) ... [2023-03-31 22:12:07,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:07" (1/1) ... [2023-03-31 22:12:07,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:07" (1/1) ... [2023-03-31 22:12:07,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:07" (1/1) ... [2023-03-31 22:12:07,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:07" (1/1) ... [2023-03-31 22:12:07,447 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:07" (1/1) ... [2023-03-31 22:12:07,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:07" (1/1) ... [2023-03-31 22:12:07,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:12:07,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:12:07,468 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:12:07,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:12:07,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:07" (1/1) ... [2023-03-31 22:12:07,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:12:07,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:12:07,490 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) [2023-03-31 22:12:07,491 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 [2023-03-31 22:12:07,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:12:07,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:12:07,519 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:12:07,519 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:12:07,519 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:12:07,519 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:12:07,519 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:12:07,519 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:12:07,519 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:12:07,519 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:12:07,519 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:12:07,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:12:07,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:12:07,519 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:12:07,520 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:12:07,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:12:07,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:12:07,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:12:07,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:12:07,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:12:07,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:12:07,604 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:12:07,606 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:12:09,300 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:12:09,759 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:12:09,759 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:12:09,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:12:09 BoogieIcfgContainer [2023-03-31 22:12:09,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:12:09,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:12:09,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:12:09,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:12:09,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:12:06" (1/3) ... [2023-03-31 22:12:09,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@180ef120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:12:09, skipping insertion in model container [2023-03-31 22:12:09,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:12:07" (2/3) ... [2023-03-31 22:12:09,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@180ef120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:12:09, skipping insertion in model container [2023-03-31 22:12:09,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:12:09" (3/3) ... [2023-03-31 22:12:09,767 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label22.c [2023-03-31 22:12:09,781 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:12:09,781 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:12:09,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:12:09,829 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;@228f0c26, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:12:09,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:12:09,834 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:12:09,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:12:09,839 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:12:09,840 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:12:09,840 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:12:09,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:12:09,844 INFO L85 PathProgramCache]: Analyzing trace with hash 271512771, now seen corresponding path program 1 times [2023-03-31 22:12:09,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:12:09,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83007749] [2023-03-31 22:12:09,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:12:09,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:12:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:12:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:12:10,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:12:10,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83007749] [2023-03-31 22:12:10,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83007749] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:12:10,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:12:10,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:12:10,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406100469] [2023-03-31 22:12:10,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:12:10,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:12:10,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:12:10,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:12:10,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:12:10,176 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:12:11,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:12:11,543 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-03-31 22:12:11,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:12:11,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 22:12:11,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:12:11,563 INFO L225 Difference]: With dead ends: 718 [2023-03-31 22:12:11,564 INFO L226 Difference]: Without dead ends: 471 [2023-03-31 22:12:11,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:12:11,579 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 235 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:12:11,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 110 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 22:12:11,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-03-31 22:12:11,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-03-31 22:12:11,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.7712418300653594) internal successors, (813), 459 states have internal predecessors, (813), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 22:12:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 824 transitions. [2023-03-31 22:12:11,641 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 824 transitions. Word has length 11 [2023-03-31 22:12:11,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:12:11,641 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 824 transitions. [2023-03-31 22:12:11,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:12:11,642 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 824 transitions. [2023-03-31 22:12:11,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 22:12:11,643 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:12:11,643 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:12:11,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:12:11,643 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:12:11,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:12:11,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1733693181, now seen corresponding path program 1 times [2023-03-31 22:12:11,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:12:11,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310383841] [2023-03-31 22:12:11,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:12:11,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:12:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:12:11,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:12:11,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:12:11,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310383841] [2023-03-31 22:12:11,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310383841] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:12:11,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:12:11,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:12:11,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450630523] [2023-03-31 22:12:11,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:12:11,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:12:11,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:12:11,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:12:11,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:12:11,741 INFO L87 Difference]: Start difference. First operand 469 states and 824 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:12:13,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:12:13,530 INFO L93 Difference]: Finished difference Result 1421 states and 2520 transitions. [2023-03-31 22:12:13,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:12:13,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-03-31 22:12:13,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:12:13,536 INFO L225 Difference]: With dead ends: 1421 [2023-03-31 22:12:13,536 INFO L226 Difference]: Without dead ends: 957 [2023-03-31 22:12:13,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:12:13,543 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 749 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-31 22:12:13,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [749 Valid, 47 Invalid, 1741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 1415 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-31 22:12:13,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2023-03-31 22:12:13,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 932. [2023-03-31 22:12:13,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 912 states have (on average 1.493421052631579) internal successors, (1362), 916 states have internal predecessors, (1362), 8 states have call successors, (8), 8 states have call predecessors, (8), 11 states have return successors, (27), 7 states have call predecessors, (27), 7 states have call successors, (27) [2023-03-31 22:12:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1397 transitions. [2023-03-31 22:12:13,580 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1397 transitions. Word has length 23 [2023-03-31 22:12:13,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:12:13,580 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1397 transitions. [2023-03-31 22:12:13,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:12:13,580 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1397 transitions. [2023-03-31 22:12:13,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 22:12:13,581 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:12:13,581 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:12:13,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:12:13,581 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:12:13,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:12:13,582 INFO L85 PathProgramCache]: Analyzing trace with hash 463347538, now seen corresponding path program 1 times [2023-03-31 22:12:13,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:12:13,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454012824] [2023-03-31 22:12:13,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:12:13,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:12:13,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:12:13,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:12:13,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:12:13,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454012824] [2023-03-31 22:12:13,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454012824] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:12:13,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:12:13,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:12:13,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391275241] [2023-03-31 22:12:13,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:12:13,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:12:13,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:12:13,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:12:13,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:12:13,709 INFO L87 Difference]: Start difference. First operand 932 states and 1397 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:12:15,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:12:15,584 INFO L93 Difference]: Finished difference Result 2827 states and 4320 transitions. [2023-03-31 22:12:15,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:12:15,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-03-31 22:12:15,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:12:15,592 INFO L225 Difference]: With dead ends: 2827 [2023-03-31 22:12:15,593 INFO L226 Difference]: Without dead ends: 1900 [2023-03-31 22:12:15,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 22:12:15,595 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 735 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:12:15,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 63 Invalid, 1853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1605 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-03-31 22:12:15,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2023-03-31 22:12:15,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1644. [2023-03-31 22:12:15,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1603 states have (on average 1.3437305053025577) internal successors, (2154), 1622 states have internal predecessors, (2154), 11 states have call successors, (11), 11 states have call predecessors, (11), 29 states have return successors, (80), 10 states have call predecessors, (80), 10 states have call successors, (80) [2023-03-31 22:12:15,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 2245 transitions. [2023-03-31 22:12:15,639 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 2245 transitions. Word has length 24 [2023-03-31 22:12:15,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:12:15,639 INFO L495 AbstractCegarLoop]: Abstraction has 1644 states and 2245 transitions. [2023-03-31 22:12:15,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:12:15,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 2245 transitions. [2023-03-31 22:12:15,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-03-31 22:12:15,643 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:12:15,643 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:12:15,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:12:15,643 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:12:15,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:12:15,644 INFO L85 PathProgramCache]: Analyzing trace with hash 153977330, now seen corresponding path program 1 times [2023-03-31 22:12:15,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:12:15,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165249013] [2023-03-31 22:12:15,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:12:15,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:12:15,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:12:15,827 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 22:12:15,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:12:15,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165249013] [2023-03-31 22:12:15,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165249013] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:12:15,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939284277] [2023-03-31 22:12:15,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:12:15,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:12:15,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:12:15,830 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) [2023-03-31 22:12:15,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:12:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:12:15,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 22:12:15,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:12:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 22:12:16,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:12:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 22:12:16,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939284277] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 22:12:16,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:12:16,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2023-03-31 22:12:16,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109151145] [2023-03-31 22:12:16,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:12:16,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:12:16,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:12:16,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:12:16,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:12:16,311 INFO L87 Difference]: Start difference. First operand 1644 states and 2245 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 22:12:17,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:12:17,959 INFO L93 Difference]: Finished difference Result 4242 states and 6011 transitions. [2023-03-31 22:12:17,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:12:17,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2023-03-31 22:12:17,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:12:17,975 INFO L225 Difference]: With dead ends: 4242 [2023-03-31 22:12:17,975 INFO L226 Difference]: Without dead ends: 2603 [2023-03-31 22:12:17,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:12:17,979 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 742 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-03-31 22:12:17,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 37 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [508 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-31 22:12:17,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2023-03-31 22:12:18,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2367. [2023-03-31 22:12:18,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 2303 states have (on average 1.2835432045158488) internal successors, (2956), 2333 states have internal predecessors, (2956), 17 states have call successors, (17), 17 states have call predecessors, (17), 46 states have return successors, (139), 16 states have call predecessors, (139), 16 states have call successors, (139) [2023-03-31 22:12:18,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 3112 transitions. [2023-03-31 22:12:18,057 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 3112 transitions. Word has length 60 [2023-03-31 22:12:18,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:12:18,058 INFO L495 AbstractCegarLoop]: Abstraction has 2367 states and 3112 transitions. [2023-03-31 22:12:18,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 22:12:18,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 3112 transitions. [2023-03-31 22:12:18,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-03-31 22:12:18,064 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:12:18,065 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:12:18,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 22:12:18,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:12:18,272 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:12:18,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:12:18,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1954208853, now seen corresponding path program 1 times [2023-03-31 22:12:18,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:12:18,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002271115] [2023-03-31 22:12:18,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:12:18,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:12:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:12:18,871 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:12:18,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:12:18,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002271115] [2023-03-31 22:12:18,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002271115] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:12:18,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779120124] [2023-03-31 22:12:18,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:12:18,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:12:18,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:12:18,873 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) [2023-03-31 22:12:18,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:12:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:12:18,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-31 22:12:18,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:12:19,378 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:12:19,378 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:12:19,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779120124] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:12:19,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:12:19,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-03-31 22:12:19,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654831148] [2023-03-31 22:12:19,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:12:19,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:12:19,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:12:19,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:12:19,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:12:19,380 INFO L87 Difference]: Start difference. First operand 2367 states and 3112 transitions. Second operand has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:12:21,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:12:21,187 INFO L93 Difference]: Finished difference Result 5727 states and 7450 transitions. [2023-03-31 22:12:21,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 22:12:21,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 162 [2023-03-31 22:12:21,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:12:21,203 INFO L225 Difference]: With dead ends: 5727 [2023-03-31 22:12:21,203 INFO L226 Difference]: Without dead ends: 3365 [2023-03-31 22:12:21,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-03-31 22:12:21,207 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 422 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1343 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-31 22:12:21,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 49 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1343 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-31 22:12:21,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2023-03-31 22:12:21,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 3091. [2023-03-31 22:12:21,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3091 states, 3001 states have (on average 1.2295901366211264) internal successors, (3690), 3048 states have internal predecessors, (3690), 22 states have call successors, (22), 22 states have call predecessors, (22), 67 states have return successors, (202), 20 states have call predecessors, (202), 21 states have call successors, (202) [2023-03-31 22:12:21,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3091 states to 3091 states and 3914 transitions. [2023-03-31 22:12:21,261 INFO L78 Accepts]: Start accepts. Automaton has 3091 states and 3914 transitions. Word has length 162 [2023-03-31 22:12:21,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:12:21,262 INFO L495 AbstractCegarLoop]: Abstraction has 3091 states and 3914 transitions. [2023-03-31 22:12:21,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.0) internal successors, (150), 4 states have internal predecessors, (150), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:12:21,262 INFO L276 IsEmpty]: Start isEmpty. Operand 3091 states and 3914 transitions. [2023-03-31 22:12:21,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-03-31 22:12:21,264 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:12:21,264 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:12:21,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 22:12:21,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:12:21,471 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:12:21,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:12:21,472 INFO L85 PathProgramCache]: Analyzing trace with hash -404134917, now seen corresponding path program 1 times [2023-03-31 22:12:21,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:12:21,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014576475] [2023-03-31 22:12:21,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:12:21,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:12:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:12:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 22:12:21,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:12:21,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014576475] [2023-03-31 22:12:21,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014576475] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:12:21,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:12:21,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:12:21,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701804275] [2023-03-31 22:12:21,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:12:21,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:12:21,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:12:21,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:12:21,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:12:21,706 INFO L87 Difference]: Start difference. First operand 3091 states and 3914 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:12:22,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:12:22,912 INFO L93 Difference]: Finished difference Result 7338 states and 9691 transitions. [2023-03-31 22:12:22,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:12:22,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 247 [2023-03-31 22:12:22,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:12:22,926 INFO L225 Difference]: With dead ends: 7338 [2023-03-31 22:12:22,926 INFO L226 Difference]: Without dead ends: 4476 [2023-03-31 22:12:22,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:12:22,935 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 228 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:12:22,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 429 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-31 22:12:22,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4476 states. [2023-03-31 22:12:22,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4476 to 3823. [2023-03-31 22:12:23,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3823 states, 3718 states have (on average 1.2079074771382463) internal successors, (4491), 3772 states have internal predecessors, (4491), 26 states have call successors, (26), 26 states have call predecessors, (26), 78 states have return successors, (274), 24 states have call predecessors, (274), 25 states have call successors, (274) [2023-03-31 22:12:23,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3823 states to 3823 states and 4791 transitions. [2023-03-31 22:12:23,009 INFO L78 Accepts]: Start accepts. Automaton has 3823 states and 4791 transitions. Word has length 247 [2023-03-31 22:12:23,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:12:23,010 INFO L495 AbstractCegarLoop]: Abstraction has 3823 states and 4791 transitions. [2023-03-31 22:12:23,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:12:23,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3823 states and 4791 transitions. [2023-03-31 22:12:23,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-03-31 22:12:23,014 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:12:23,014 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:12:23,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 22:12:23,015 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:12:23,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:12:23,015 INFO L85 PathProgramCache]: Analyzing trace with hash 575418196, now seen corresponding path program 1 times [2023-03-31 22:12:23,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:12:23,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469837480] [2023-03-31 22:12:23,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:12:23,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:12:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:12:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:12:23,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:12:23,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469837480] [2023-03-31 22:12:23,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469837480] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:12:23,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123608399] [2023-03-31 22:12:23,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:12:23,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:12:23,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:12:23,837 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) [2023-03-31 22:12:23,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 22:12:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:12:23,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 11 conjunts are in the unsatisfiable core [2023-03-31 22:12:23,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:12:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 22:12:26,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:12:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 22:12:26,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123608399] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 22:12:26,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:12:26,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 6] total 13 [2023-03-31 22:12:26,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437936613] [2023-03-31 22:12:26,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:12:26,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:12:26,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:12:26,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:12:26,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-03-31 22:12:26,616 INFO L87 Difference]: Start difference. First operand 3823 states and 4791 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:12:27,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:12:27,845 INFO L93 Difference]: Finished difference Result 9559 states and 12373 transitions. [2023-03-31 22:12:27,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:12:27,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 248 [2023-03-31 22:12:27,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:12:27,860 INFO L225 Difference]: With dead ends: 9559 [2023-03-31 22:12:27,860 INFO L226 Difference]: Without dead ends: 5965 [2023-03-31 22:12:27,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 492 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-03-31 22:12:27,868 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 247 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:12:27,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 408 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-31 22:12:27,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5965 states. [2023-03-31 22:12:27,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5965 to 5393. [2023-03-31 22:12:27,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5393 states, 5258 states have (on average 1.1631799163179917) internal successors, (6116), 5330 states have internal predecessors, (6116), 32 states have call successors, (32), 32 states have call predecessors, (32), 102 states have return successors, (421), 30 states have call predecessors, (421), 31 states have call successors, (421) [2023-03-31 22:12:27,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5393 states to 5393 states and 6569 transitions. [2023-03-31 22:12:27,970 INFO L78 Accepts]: Start accepts. Automaton has 5393 states and 6569 transitions. Word has length 248 [2023-03-31 22:12:27,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:12:27,970 INFO L495 AbstractCegarLoop]: Abstraction has 5393 states and 6569 transitions. [2023-03-31 22:12:27,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:12:27,971 INFO L276 IsEmpty]: Start isEmpty. Operand 5393 states and 6569 transitions. [2023-03-31 22:12:27,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2023-03-31 22:12:27,973 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:12:27,973 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:12:27,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 22:12:28,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:12:28,178 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:12:28,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:12:28,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1922849534, now seen corresponding path program 1 times [2023-03-31 22:12:28,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:12:28,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917261362] [2023-03-31 22:12:28,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:12:28,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:12:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:12:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 42 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-31 22:12:28,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:12:28,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917261362] [2023-03-31 22:12:28,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917261362] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:12:28,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534812332] [2023-03-31 22:12:28,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:12:28,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:12:28,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:12:28,417 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) [2023-03-31 22:12:28,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 22:12:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:12:28,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:12:28,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:12:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:12:28,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:12:28,677 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 42 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-31 22:12:28,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534812332] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:12:28,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1291866813] [2023-03-31 22:12:28,694 INFO L159 IcfgInterpreter]: Started Sifa with 222 locations of interest [2023-03-31 22:12:28,694 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:12:28,697 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:12:28,700 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:12:28,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:12:28,801 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-03-31 22:12:29,194 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2023-03-31 22:12:29,337 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2023-03-31 22:12:29,697 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 9062 conjuctions. This might take some time... [2023-03-31 22:12:29,818 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 110 conjuctions. [2023-03-31 22:12:30,690 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 42 for LOIs [2023-03-31 22:12:30,714 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2023-03-31 22:12:40,707 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49