/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_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:14:52,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:14:52,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:14:52,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:14:52,690 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:14:52,691 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:14:52,692 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:14:52,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:14:52,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:14:52,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:14:52,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:14:52,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:14:52,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:14:52,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:14:52,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:14:52,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:14:52,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:14:52,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:14:52,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:14:52,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:14:52,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:14:52,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:14:52,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:14:52,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:14:52,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 21:14:52,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:14:52,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:14:52,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:14:52,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:14:52,727 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:14:52,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:14:52,728 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:14:52,728 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:14:52,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:14:52,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:14:52,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:14:52,734 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 21:14:52,768 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:14:52,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:14:52,768 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:14:52,768 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:14:52,769 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:14:52,769 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:14:52,769 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:14:52,770 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:14:52,770 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:14:52,770 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:14:52,770 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:14:52,771 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:14:52,771 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:14:52,771 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:14:52,771 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:14:52,771 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:14:52,771 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:14:52,771 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:14:52,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:14:52,772 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:14:52,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:14:52,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:14:52,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:14:52,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:14:52,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:14:52,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:14:52,773 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:14:52,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:14:52,773 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:14:52,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:14:52,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:14:52,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:14:52,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:14:52,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:14:52,774 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:14:52,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:14:52,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:14:52,775 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:14:52,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:14:52,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:14:52,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:14:52,775 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:14:52,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:14:53,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:14:53,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:14:53,016 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:14:53,017 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:14:53,018 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label29.c [2023-03-31 21:14:54,232 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:14:54,505 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:14:54,506 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label29.c [2023-03-31 21:14:54,516 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3a3f53b3/41228deab8be42adb4c61c310fd68c3c/FLAG50de96264 [2023-03-31 21:14:54,536 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3a3f53b3/41228deab8be42adb4c61c310fd68c3c [2023-03-31 21:14:54,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:14:54,539 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:14:54,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:14:54,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:14:54,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:14:54,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:14:54" (1/1) ... [2023-03-31 21:14:54,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fea79a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:54, skipping insertion in model container [2023-03-31 21:14:54,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:14:54" (1/1) ... [2023-03-31 21:14:54,551 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:14:54,588 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:14:54,868 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_label29.c[17015,17028] [2023-03-31 21:14:54,895 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:14:54,915 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:14:54,999 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_label29.c[17015,17028] [2023-03-31 21:14:55,020 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:14:55,042 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:14:55,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:55 WrapperNode [2023-03-31 21:14:55,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:14:55,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:14:55,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:14:55,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:14:55,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:55" (1/1) ... [2023-03-31 21:14:55,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:55" (1/1) ... [2023-03-31 21:14:55,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:55" (1/1) ... [2023-03-31 21:14:55,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:55" (1/1) ... [2023-03-31 21:14:55,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:55" (1/1) ... [2023-03-31 21:14:55,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:55" (1/1) ... [2023-03-31 21:14:55,123 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:55" (1/1) ... [2023-03-31 21:14:55,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:55" (1/1) ... [2023-03-31 21:14:55,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:14:55,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:14:55,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:14:55,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:14:55,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:55" (1/1) ... [2023-03-31 21:14:55,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:14:55,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:14:55,166 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 21:14:55,188 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 21:14:55,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:14:55,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:14:55,208 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:14:55,209 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:14:55,209 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:14:55,209 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:14:55,210 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:14:55,210 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:14:55,210 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:14:55,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:14:55,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:14:55,211 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:14:55,211 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:14:55,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:14:55,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:14:55,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:14:55,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:14:55,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:14:55,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:14:55,318 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:14:55,320 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:14:56,127 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:14:56,347 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:14:56,347 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:14:56,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:14:56 BoogieIcfgContainer [2023-03-31 21:14:56,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:14:56,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:14:56,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:14:56,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:14:56,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:14:54" (1/3) ... [2023-03-31 21:14:56,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2553c4da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:14:56, skipping insertion in model container [2023-03-31 21:14:56,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:14:55" (2/3) ... [2023-03-31 21:14:56,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2553c4da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:14:56, skipping insertion in model container [2023-03-31 21:14:56,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:14:56" (3/3) ... [2023-03-31 21:14:56,358 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label29.c [2023-03-31 21:14:56,372 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:14:56,373 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:14:56,420 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:14:56,426 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;@a59376a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:14:56,426 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:14:56,430 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 21:14:56,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-03-31 21:14:56,439 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:14:56,439 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 21:14:56,440 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:14:56,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:14:56,444 INFO L85 PathProgramCache]: Analyzing trace with hash -818169257, now seen corresponding path program 1 times [2023-03-31 21:14:56,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:14:56,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237745251] [2023-03-31 21:14:56,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:14:56,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:14:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:14:57,060 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 21:14:57,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:14:57,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237745251] [2023-03-31 21:14:57,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237745251] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:14:57,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:14:57,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:14:57,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638687295] [2023-03-31 21:14:57,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:14:57,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:14:57,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:14:57,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:14:57,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:14:57,112 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 21:14:57,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:14:57,489 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-03-31 21:14:57,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:14:57,492 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 21:14:57,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:14:57,506 INFO L225 Difference]: With dead ends: 273 [2023-03-31 21:14:57,506 INFO L226 Difference]: Without dead ends: 175 [2023-03-31 21:14:57,510 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 21:14:57,515 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 47 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:14:57,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 51 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:14:57,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-03-31 21:14:57,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-03-31 21:14:57,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.7544910179640718) internal successors, (293), 167 states have internal predecessors, (293), 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 21:14:57,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 302 transitions. [2023-03-31 21:14:57,584 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 302 transitions. Word has length 86 [2023-03-31 21:14:57,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:14:57,586 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 302 transitions. [2023-03-31 21:14:57,586 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 21:14:57,587 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 302 transitions. [2023-03-31 21:14:57,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-03-31 21:14:57,596 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:14:57,596 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 21:14:57,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:14:57,597 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:14:57,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:14:57,597 INFO L85 PathProgramCache]: Analyzing trace with hash 242734534, now seen corresponding path program 1 times [2023-03-31 21:14:57,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:14:57,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081240629] [2023-03-31 21:14:57,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:14:57,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:14:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:14:57,894 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 21:14:57,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:14:57,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081240629] [2023-03-31 21:14:57,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081240629] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:14:57,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:14:57,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:14:57,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627264065] [2023-03-31 21:14:57,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:14:57,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:14:57,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:14:57,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:14:57,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:14:57,899 INFO L87 Difference]: Start difference. First operand 175 states and 302 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 21:14:58,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:14:58,391 INFO L93 Difference]: Finished difference Result 537 states and 947 transitions. [2023-03-31 21:14:58,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:14:58,392 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 21:14:58,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:14:58,398 INFO L225 Difference]: With dead ends: 537 [2023-03-31 21:14:58,398 INFO L226 Difference]: Without dead ends: 367 [2023-03-31 21:14:58,399 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 21:14:58,400 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 275 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:14:58,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 97 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:14:58,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-03-31 21:14:58,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 351. [2023-03-31 21:14:58,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 335 states have (on average 1.6746268656716419) internal successors, (561), 339 states have internal predecessors, (561), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-03-31 21:14:58,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 588 transitions. [2023-03-31 21:14:58,445 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 588 transitions. Word has length 108 [2023-03-31 21:14:58,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:14:58,447 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 588 transitions. [2023-03-31 21:14:58,448 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 21:14:58,448 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 588 transitions. [2023-03-31 21:14:58,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-03-31 21:14:58,449 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:14:58,450 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, 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] [2023-03-31 21:14:58,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:14:58,450 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:14:58,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:14:58,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1171132246, now seen corresponding path program 1 times [2023-03-31 21:14:58,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:14:58,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841352382] [2023-03-31 21:14:58,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:14:58,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:14:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:14:58,723 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:14:58,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:14:58,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841352382] [2023-03-31 21:14:58,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841352382] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:14:58,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:14:58,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:14:58,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772183473] [2023-03-31 21:14:58,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:14:58,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:14:58,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:14:58,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:14:58,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:14:58,726 INFO L87 Difference]: Start difference. First operand 351 states and 588 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 21:14:59,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:14:59,139 INFO L93 Difference]: Finished difference Result 1093 states and 1911 transitions. [2023-03-31 21:14:59,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:14:59,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 119 [2023-03-31 21:14:59,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:14:59,146 INFO L225 Difference]: With dead ends: 1093 [2023-03-31 21:14:59,146 INFO L226 Difference]: Without dead ends: 747 [2023-03-31 21:14:59,154 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 21:14:59,156 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 306 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 21:14:59,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 51 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 21:14:59,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2023-03-31 21:14:59,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 721. [2023-03-31 21:14:59,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 680 states have (on average 1.576470588235294) internal successors, (1072), 701 states have internal predecessors, (1072), 10 states have call successors, (10), 10 states have call predecessors, (10), 30 states have return successors, (87), 9 states have call predecessors, (87), 9 states have call successors, (87) [2023-03-31 21:14:59,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1169 transitions. [2023-03-31 21:14:59,197 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1169 transitions. Word has length 119 [2023-03-31 21:14:59,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:14:59,201 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 1169 transitions. [2023-03-31 21:14:59,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 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 21:14:59,201 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1169 transitions. [2023-03-31 21:14:59,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-03-31 21:14:59,208 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:14:59,208 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, 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] [2023-03-31 21:14:59,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 21:14:59,209 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:14:59,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:14:59,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1877083294, now seen corresponding path program 1 times [2023-03-31 21:14:59,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:14:59,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808747498] [2023-03-31 21:14:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:14:59,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:14:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:14:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:14:59,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:14:59,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808747498] [2023-03-31 21:14:59,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808747498] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:14:59,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536569139] [2023-03-31 21:14:59,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:14:59,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:14:59,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:14:59,792 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 21:14:59,805 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 21:14:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:14:59,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:14:59,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:15:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:15:00,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:15:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:15:00,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536569139] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:15:00,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1978574865] [2023-03-31 21:15:00,220 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-03-31 21:15:00,220 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:15:00,224 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:15:00,228 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:15:00,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:15:00,493 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 65 for LOIs [2023-03-31 21:15:01,592 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 76 for LOIs