/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/Problem02_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:13:22,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:13:22,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:13:22,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:13:22,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:13:22,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:13:22,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:13:22,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:13:22,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:13:22,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:13:22,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:13:22,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:13:22,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:13:22,046 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:13:22,047 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:13:22,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:13:22,048 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:13:22,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:13:22,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:13:22,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:13:22,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:13:22,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:13:22,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:13:22,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:13:22,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 21:13:22,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:13:22,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:13:22,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:13:22,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:13:22,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:13:22,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:13:22,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:13:22,065 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:13:22,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:13:22,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:13:22,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:13:22,068 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 21:13:22,084 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:13:22,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:13:22,085 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:13:22,085 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:13:22,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:13:22,085 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:13:22,085 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:13:22,086 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:13:22,086 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:13:22,086 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:13:22,086 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:13:22,086 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:13:22,086 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:13:22,086 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:13:22,086 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:13:22,086 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:13:22,086 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:13:22,086 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:13:22,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:13:22,087 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:13:22,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:13:22,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:13:22,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:13:22,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:13:22,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:13:22,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:13:22,087 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:13:22,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:13:22,088 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:13:22,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:13:22,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:13:22,088 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:13:22,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:13:22,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:13:22,088 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:13:22,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:13:22,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:13:22,093 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:13:22,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:13:22,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:13:22,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:13:22,093 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:13:22,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:13:22,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:13:22,308 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:13:22,309 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:13:22,314 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:13:22,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label08.c [2023-03-31 21:13:23,367 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:13:23,592 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:13:23,592 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label08.c [2023-03-31 21:13:23,608 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bd14eb5c/f09c006308cc4ac5a02cc0d860f84e2f/FLAGffd6711bd [2023-03-31 21:13:23,618 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bd14eb5c/f09c006308cc4ac5a02cc0d860f84e2f [2023-03-31 21:13:23,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:13:23,621 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:13:23,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:13:23,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:13:23,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:13:23,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:13:23" (1/1) ... [2023-03-31 21:13:23,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31bec2cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:23, skipping insertion in model container [2023-03-31 21:13:23,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:13:23" (1/1) ... [2023-03-31 21:13:23,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:13:23,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:13:23,863 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/Problem02_label08.c[19283,19296] [2023-03-31 21:13:23,882 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:13:23,890 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:13:23,950 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/Problem02_label08.c[19283,19296] [2023-03-31 21:13:23,958 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:13:23,968 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:13:23,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:23 WrapperNode [2023-03-31 21:13:23,969 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:13:23,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:13:23,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:13:23,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:13:23,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:23" (1/1) ... [2023-03-31 21:13:23,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:23" (1/1) ... [2023-03-31 21:13:23,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:23" (1/1) ... [2023-03-31 21:13:23,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:23" (1/1) ... [2023-03-31 21:13:24,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:23" (1/1) ... [2023-03-31 21:13:24,034 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:23" (1/1) ... [2023-03-31 21:13:24,039 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:23" (1/1) ... [2023-03-31 21:13:24,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:23" (1/1) ... [2023-03-31 21:13:24,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:13:24,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:13:24,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:13:24,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:13:24,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:23" (1/1) ... [2023-03-31 21:13:24,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:13:24,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:13:24,076 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 21:13:24,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:13:24,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:13:24,104 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:13:24,104 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:13:24,104 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:13:24,104 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:13:24,104 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:13:24,104 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:13:24,104 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:13:24,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:13:24,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:13:24,105 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:13:24,105 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:13:24,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:13:24,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:13:24,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:13:24,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:13:24,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:13:24,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:13:24,093 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 21:13:24,164 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:13:24,166 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:13:24,932 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:13:25,156 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:13:25,156 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:13:25,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:13:25 BoogieIcfgContainer [2023-03-31 21:13:25,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:13:25,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:13:25,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:13:25,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:13:25,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:13:23" (1/3) ... [2023-03-31 21:13:25,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f940ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:13:25, skipping insertion in model container [2023-03-31 21:13:25,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:13:23" (2/3) ... [2023-03-31 21:13:25,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f940ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:13:25, skipping insertion in model container [2023-03-31 21:13:25,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:13:25" (3/3) ... [2023-03-31 21:13:25,166 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label08.c [2023-03-31 21:13:25,181 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:13:25,181 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:13:25,232 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:13:25,237 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;@25c1c8f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:13:25,238 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:13:25,242 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 21:13:25,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-03-31 21:13:25,249 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:13:25,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:13:25,250 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:13:25,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:13:25,256 INFO L85 PathProgramCache]: Analyzing trace with hash -818164137, now seen corresponding path program 1 times [2023-03-31 21:13:25,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:13:25,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385546661] [2023-03-31 21:13:25,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:13:25,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:13:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:13:25,710 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 21:13:25,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:13:25,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385546661] [2023-03-31 21:13:25,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385546661] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:13:25,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:13:25,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:13:25,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744642617] [2023-03-31 21:13:25,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:13:25,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:13:25,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:13:25,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:13:25,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:13:25,751 INFO L87 Difference]: Start difference. First operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 21:13:26,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:13:26,119 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-03-31 21:13:26,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:13:26,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 86 [2023-03-31 21:13:26,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:13:26,127 INFO L225 Difference]: With dead ends: 273 [2023-03-31 21:13:26,127 INFO L226 Difference]: Without dead ends: 175 [2023-03-31 21:13:26,156 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 21:13:26,158 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:13:26,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 30 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:13:26,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-03-31 21:13:26,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-03-31 21:13:26,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.904191616766467) internal successors, (318), 167 states have internal predecessors, (318), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 21:13:26,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 327 transitions. [2023-03-31 21:13:26,193 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 327 transitions. Word has length 86 [2023-03-31 21:13:26,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:13:26,193 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 327 transitions. [2023-03-31 21:13:26,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 21:13:26,194 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 327 transitions. [2023-03-31 21:13:26,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-03-31 21:13:26,197 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:13:26,197 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 21:13:26,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:13:26,197 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:13:26,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:13:26,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1159818399, now seen corresponding path program 1 times [2023-03-31 21:13:26,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:13:26,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629887802] [2023-03-31 21:13:26,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:13:26,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:13:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:13:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:13:26,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:13:26,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629887802] [2023-03-31 21:13:26,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629887802] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:13:26,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:13:26,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:13:26,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411800777] [2023-03-31 21:13:26,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:13:26,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:13:26,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:13:26,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:13:26,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:13:26,354 INFO L87 Difference]: Start difference. First operand 175 states and 327 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 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 21:13:26,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:13:26,724 INFO L93 Difference]: Finished difference Result 529 states and 1003 transitions. [2023-03-31 21:13:26,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:13:26,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 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 101 [2023-03-31 21:13:26,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:13:26,727 INFO L225 Difference]: With dead ends: 529 [2023-03-31 21:13:26,728 INFO L226 Difference]: Without dead ends: 359 [2023-03-31 21:13:26,729 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 21:13:26,729 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 363 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:13:26,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 48 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:13:26,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-03-31 21:13:26,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 267. [2023-03-31 21:13:26,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 253 states have (on average 1.8339920948616601) internal successors, (464), 257 states have internal predecessors, (464), 5 states have call successors, (5), 5 states have call predecessors, (5), 8 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2023-03-31 21:13:26,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 484 transitions. [2023-03-31 21:13:26,746 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 484 transitions. Word has length 101 [2023-03-31 21:13:26,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:13:26,746 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 484 transitions. [2023-03-31 21:13:26,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 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 21:13:26,746 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 484 transitions. [2023-03-31 21:13:26,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-03-31 21:13:26,748 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:13:26,748 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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] [2023-03-31 21:13:26,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:13:26,749 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:13:26,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:13:26,749 INFO L85 PathProgramCache]: Analyzing trace with hash 242739654, now seen corresponding path program 1 times [2023-03-31 21:13:26,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:13:26,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710057796] [2023-03-31 21:13:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:13:26,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:13:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:13:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:13:26,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:13:26,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710057796] [2023-03-31 21:13:26,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710057796] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:13:26,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:13:26,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:13:26,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316607145] [2023-03-31 21:13:26,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:13:26,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:13:26,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:13:26,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:13:26,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:13:26,940 INFO L87 Difference]: Start difference. First operand 267 states and 484 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 21:13:27,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:13:27,256 INFO L93 Difference]: Finished difference Result 833 states and 1554 transitions. [2023-03-31 21:13:27,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:13:27,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 108 [2023-03-31 21:13:27,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:13:27,259 INFO L225 Difference]: With dead ends: 833 [2023-03-31 21:13:27,260 INFO L226 Difference]: Without dead ends: 571 [2023-03-31 21:13:27,261 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 21:13:27,262 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 273 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:13:27,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 108 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:13:27,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2023-03-31 21:13:27,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 545. [2023-03-31 21:13:27,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 512 states have (on average 1.736328125) internal successors, (889), 529 states have internal predecessors, (889), 8 states have call successors, (8), 8 states have call predecessors, (8), 24 states have return successors, (59), 7 states have call predecessors, (59), 7 states have call successors, (59) [2023-03-31 21:13:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 956 transitions. [2023-03-31 21:13:27,285 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 956 transitions. Word has length 108 [2023-03-31 21:13:27,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:13:27,285 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 956 transitions. [2023-03-31 21:13:27,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 21:13:27,286 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 956 transitions. [2023-03-31 21:13:27,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-03-31 21:13:27,289 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:13:27,289 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2023-03-31 21:13:27,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 21:13:27,289 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:13:27,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:13:27,289 INFO L85 PathProgramCache]: Analyzing trace with hash -810550834, now seen corresponding path program 1 times [2023-03-31 21:13:27,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:13:27,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404652591] [2023-03-31 21:13:27,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:13:27,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:13:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:13:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:13:27,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:13:27,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404652591] [2023-03-31 21:13:27,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404652591] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:13:27,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:13:27,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:13:27,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105527707] [2023-03-31 21:13:27,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:13:27,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:13:27,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:13:27,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:13:27,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:13:27,414 INFO L87 Difference]: Start difference. First operand 545 states and 956 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 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 21:13:27,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:13:27,794 INFO L93 Difference]: Finished difference Result 1673 states and 3157 transitions. [2023-03-31 21:13:27,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:13:27,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 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 112 [2023-03-31 21:13:27,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:13:27,801 INFO L225 Difference]: With dead ends: 1673 [2023-03-31 21:13:27,802 INFO L226 Difference]: Without dead ends: 1133 [2023-03-31 21:13:27,803 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 21:13:27,809 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 330 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:13:27,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 42 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:13:27,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2023-03-31 21:13:27,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 1105. [2023-03-31 21:13:27,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1032 states have (on average 1.5998062015503876) internal successors, (1651), 1077 states have internal predecessors, (1651), 14 states have call successors, (14), 14 states have call predecessors, (14), 58 states have return successors, (221), 13 states have call predecessors, (221), 13 states have call successors, (221) [2023-03-31 21:13:27,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1886 transitions. [2023-03-31 21:13:27,870 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1886 transitions. Word has length 112 [2023-03-31 21:13:27,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:13:27,871 INFO L495 AbstractCegarLoop]: Abstraction has 1105 states and 1886 transitions. [2023-03-31 21:13:27,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 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 21:13:27,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1886 transitions. [2023-03-31 21:13:27,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-03-31 21:13:27,875 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:13:27,875 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, 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] [2023-03-31 21:13:27,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 21:13:27,876 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:13:27,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:13:27,877 INFO L85 PathProgramCache]: Analyzing trace with hash -205540974, now seen corresponding path program 1 times [2023-03-31 21:13:27,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:13:27,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25394068] [2023-03-31 21:13:27,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:13:27,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:13:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:13:28,469 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:13:28,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:13:28,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25394068] [2023-03-31 21:13:28,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25394068] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:13:28,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791369722] [2023-03-31 21:13:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:13:28,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:13:28,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:13:28,472 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 21:13:28,473 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 21:13:28,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:13:28,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:13:28,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:13:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:13:28,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:13:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:13:28,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791369722] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:13:28,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2018769001] [2023-03-31 21:13:28,849 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-03-31 21:13:28,850 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:13:28,852 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:13:28,856 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:13:28,856 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:13:29,080 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 65 for LOIs [2023-03-31 21:13:30,011 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 77 for LOIs