/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/Problem16_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:18:05,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:18:05,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:18:05,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:18:05,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:18:05,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:18:05,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:18:05,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:18:05,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:18:05,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:18:05,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:18:05,554 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:18:05,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:18:05,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:18:05,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:18:05,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:18:05,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:18:05,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:18:05,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:18:05,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:18:05,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:18:05,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:18:05,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:18:05,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:18:05,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 22:18:05,570 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:18:05,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:18:05,571 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:18:05,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:18:05,572 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:18:05,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:18:05,573 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:18:05,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:18:05,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:18:05,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:18:05,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:18:05,575 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 22:18:05,591 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:18:05,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:18:05,593 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:18:05,593 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:18:05,594 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:18:05,594 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:18:05,594 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:18:05,594 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:18:05,595 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:18:05,595 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:18:05,595 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:18:05,595 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:18:05,596 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:18:05,596 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:18:05,596 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:18:05,596 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:18:05,596 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:18:05,596 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:18:05,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:18:05,597 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:18:05,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:18:05,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:18:05,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:18:05,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:18:05,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:18:05,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:18:05,597 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:18:05,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:18:05,598 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:18:05,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:18:05,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:18:05,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:18:05,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:18:05,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:18:05,598 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:18:05,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:18:05,599 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:18:05,599 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:18:05,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:18:05,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:18:05,599 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:18:05,599 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:18:05,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:18:05,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:18:05,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:18:05,857 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:18:05,857 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:18:05,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label42.c [2023-03-31 22:18:06,956 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:18:07,255 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:18:07,255 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label42.c [2023-03-31 22:18:07,278 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14e32d44b/fa79a80df0c34064b29a888aa2f1f03f/FLAGda7c925fd [2023-03-31 22:18:07,293 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14e32d44b/fa79a80df0c34064b29a888aa2f1f03f [2023-03-31 22:18:07,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:18:07,298 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:18:07,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:18:07,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:18:07,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:18:07,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:18:07" (1/1) ... [2023-03-31 22:18:07,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f240b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:07, skipping insertion in model container [2023-03-31 22:18:07,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:18:07" (1/1) ... [2023-03-31 22:18:07,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:18:07,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:18:07,547 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/Problem16_label42.c[6474,6487] [2023-03-31 22:18:07,799 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:18:07,806 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:18:07,822 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/Problem16_label42.c[6474,6487] [2023-03-31 22:18:07,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:18:07,965 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:18:07,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:07 WrapperNode [2023-03-31 22:18:07,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:18:07,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:18:07,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:18:07,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:18:07,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:07" (1/1) ... [2023-03-31 22:18:07,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:07" (1/1) ... [2023-03-31 22:18:08,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:07" (1/1) ... [2023-03-31 22:18:08,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:07" (1/1) ... [2023-03-31 22:18:08,081 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:07" (1/1) ... [2023-03-31 22:18:08,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:07" (1/1) ... [2023-03-31 22:18:08,113 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:07" (1/1) ... [2023-03-31 22:18:08,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:07" (1/1) ... [2023-03-31 22:18:08,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:18:08,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:18:08,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:18:08,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:18:08,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:07" (1/1) ... [2023-03-31 22:18:08,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:18:08,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:18:08,170 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 22:18:08,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 22:18:08,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:18:08,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:18:08,205 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:18:08,205 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:18:08,205 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:18:08,205 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:18:08,205 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:18:08,205 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:18:08,205 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:18:08,205 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:18:08,206 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:18:08,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:18:08,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:18:08,206 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:18:08,206 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:18:08,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:18:08,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:18:08,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:18:08,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:18:08,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:18:08,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:18:08,268 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:18:08,271 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:18:09,831 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:18:10,664 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:18:10,664 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:18:10,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:18:10 BoogieIcfgContainer [2023-03-31 22:18:10,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:18:10,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:18:10,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:18:10,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:18:10,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:18:07" (1/3) ... [2023-03-31 22:18:10,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79635f44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:18:10, skipping insertion in model container [2023-03-31 22:18:10,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:18:07" (2/3) ... [2023-03-31 22:18:10,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79635f44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:18:10, skipping insertion in model container [2023-03-31 22:18:10,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:18:10" (3/3) ... [2023-03-31 22:18:10,675 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label42.c [2023-03-31 22:18:10,687 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:18:10,687 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:18:10,736 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:18:10,741 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;@5cfd4b80, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:18:10,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:18:10,747 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:18:10,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:18:10,752 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:18:10,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:18:10,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:18:10,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:18:10,759 INFO L85 PathProgramCache]: Analyzing trace with hash -706726231, now seen corresponding path program 1 times [2023-03-31 22:18:10,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:18:10,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245850644] [2023-03-31 22:18:10,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:18:10,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:18:10,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:18:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:18:11,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:18:11,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245850644] [2023-03-31 22:18:11,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245850644] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:18:11,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:18:11,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:18:11,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531675636] [2023-03-31 22:18:11,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:18:11,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:18:11,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:18:11,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:18:11,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:18:11,069 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:18:12,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:18:12,183 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-03-31 22:18:12,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:18:12,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 22:18:12,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:18:12,194 INFO L225 Difference]: With dead ends: 718 [2023-03-31 22:18:12,194 INFO L226 Difference]: Without dead ends: 471 [2023-03-31 22:18:12,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:18:12,200 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 307 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:18:12,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 54 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-03-31 22:18:12,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-03-31 22:18:12,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 462. [2023-03-31 22:18:12,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 452 states have (on average 1.915929203539823) internal successors, (866), 452 states have internal predecessors, (866), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-31 22:18:12,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 877 transitions. [2023-03-31 22:18:12,247 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 877 transitions. Word has length 11 [2023-03-31 22:18:12,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:18:12,248 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 877 transitions. [2023-03-31 22:18:12,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:18:12,248 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 877 transitions. [2023-03-31 22:18:12,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-03-31 22:18:12,250 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:18:12,250 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:18:12,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:18:12,250 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:18:12,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:18:12,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1365493340, now seen corresponding path program 1 times [2023-03-31 22:18:12,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:18:12,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893555590] [2023-03-31 22:18:12,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:18:12,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:18:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:18:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:18:12,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:18:12,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893555590] [2023-03-31 22:18:12,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893555590] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:18:12,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:18:12,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:18:12,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92328730] [2023-03-31 22:18:12,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:18:12,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:18:12,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:18:12,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:18:12,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:18:12,433 INFO L87 Difference]: Start difference. First operand 462 states and 877 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:18:13,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:18:13,798 INFO L93 Difference]: Finished difference Result 1390 states and 2669 transitions. [2023-03-31 22:18:13,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:18:13,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 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 44 [2023-03-31 22:18:13,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:18:13,804 INFO L225 Difference]: With dead ends: 1390 [2023-03-31 22:18:13,804 INFO L226 Difference]: Without dead ends: 933 [2023-03-31 22:18:13,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:18:13,806 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 853 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:18:13,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [853 Valid, 43 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 22:18:13,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2023-03-31 22:18:13,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 917. [2023-03-31 22:18:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 900 states have (on average 1.8311111111111111) internal successors, (1648), 903 states have internal predecessors, (1648), 7 states have call successors, (7), 7 states have call predecessors, (7), 9 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2023-03-31 22:18:13,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1678 transitions. [2023-03-31 22:18:13,857 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1678 transitions. Word has length 44 [2023-03-31 22:18:13,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:18:13,857 INFO L495 AbstractCegarLoop]: Abstraction has 917 states and 1678 transitions. [2023-03-31 22:18:13,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:18:13,858 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1678 transitions. [2023-03-31 22:18:13,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-03-31 22:18:13,861 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:18:13,861 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, 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] [2023-03-31 22:18:13,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:18:13,862 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:18:13,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:18:13,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1692722445, now seen corresponding path program 1 times [2023-03-31 22:18:13,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:18:13,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369385573] [2023-03-31 22:18:13,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:18:13,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:18:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:18:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:18:14,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:18:14,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369385573] [2023-03-31 22:18:14,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369385573] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:18:14,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605570073] [2023-03-31 22:18:14,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:18:14,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:18:14,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:18:14,160 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:18:14,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:18:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:18:14,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:18:14,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:18:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:18:14,475 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:18:14,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605570073] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:18:14,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:18:14,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:18:14,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752858875] [2023-03-31 22:18:14,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:18:14,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:18:14,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:18:14,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:18:14,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:18:14,477 INFO L87 Difference]: Start difference. First operand 917 states and 1678 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:18:15,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:18:15,543 INFO L93 Difference]: Finished difference Result 2749 states and 5075 transitions. [2023-03-31 22:18:15,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:18:15,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 95 [2023-03-31 22:18:15,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:18:15,552 INFO L225 Difference]: With dead ends: 2749 [2023-03-31 22:18:15,552 INFO L226 Difference]: Without dead ends: 1837 [2023-03-31 22:18:15,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:18:15,559 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 887 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:18:15,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [887 Valid, 37 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-03-31 22:18:15,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1837 states. [2023-03-31 22:18:15,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1837 to 1168. [2023-03-31 22:18:15,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1140 states have (on average 1.7456140350877194) internal successors, (1990), 1148 states have internal predecessors, (1990), 10 states have call successors, (10), 10 states have call predecessors, (10), 17 states have return successors, (48), 9 states have call predecessors, (48), 9 states have call successors, (48) [2023-03-31 22:18:15,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 2048 transitions. [2023-03-31 22:18:15,611 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 2048 transitions. Word has length 95 [2023-03-31 22:18:15,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:18:15,611 INFO L495 AbstractCegarLoop]: Abstraction has 1168 states and 2048 transitions. [2023-03-31 22:18:15,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:18:15,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 2048 transitions. [2023-03-31 22:18:15,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-03-31 22:18:15,615 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:18:15,615 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 22:18:15,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 22:18:15,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:18:15,822 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:18:15,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:18:15,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1584920917, now seen corresponding path program 1 times [2023-03-31 22:18:15,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:18:15,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918234771] [2023-03-31 22:18:15,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:18:15,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:18:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:18:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 15 proven. 76 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-03-31 22:18:16,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:18:16,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918234771] [2023-03-31 22:18:16,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918234771] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:18:16,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86282468] [2023-03-31 22:18:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:18:16,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:18:16,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:18:16,107 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:18:16,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:18:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:18:16,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:18:16,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:18:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-03-31 22:18:16,364 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:18:16,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86282468] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:18:16,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:18:16,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:18:16,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227195611] [2023-03-31 22:18:16,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:18:16,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:18:16,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:18:16,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:18:16,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:18:16,370 INFO L87 Difference]: Start difference. First operand 1168 states and 2048 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:18:17,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:18:17,610 INFO L93 Difference]: Finished difference Result 2591 states and 4491 transitions. [2023-03-31 22:18:17,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:18:17,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 151 [2023-03-31 22:18:17,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:18:17,616 INFO L225 Difference]: With dead ends: 2591 [2023-03-31 22:18:17,616 INFO L226 Difference]: Without dead ends: 1428 [2023-03-31 22:18:17,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-03-31 22:18:17,619 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 799 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:18:17,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [799 Valid, 46 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-31 22:18:17,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2023-03-31 22:18:17,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1410. [2023-03-31 22:18:17,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1374 states have (on average 1.5254730713245996) internal successors, (2096), 1386 states have internal predecessors, (2096), 12 states have call successors, (12), 12 states have call predecessors, (12), 23 states have return successors, (68), 11 states have call predecessors, (68), 11 states have call successors, (68) [2023-03-31 22:18:17,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 2176 transitions. [2023-03-31 22:18:17,648 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 2176 transitions. Word has length 151 [2023-03-31 22:18:17,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:18:17,648 INFO L495 AbstractCegarLoop]: Abstraction has 1410 states and 2176 transitions. [2023-03-31 22:18:17,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:18:17,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 2176 transitions. [2023-03-31 22:18:17,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2023-03-31 22:18:17,651 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:18:17,651 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:18:17,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 22:18:17,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-31 22:18:17,860 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:18:17,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:18:17,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1861989983, now seen corresponding path program 1 times [2023-03-31 22:18:17,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:18:17,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493485451] [2023-03-31 22:18:17,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:18:17,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:18:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:18:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 82 proven. 82 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-03-31 22:18:18,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:18:18,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493485451] [2023-03-31 22:18:18,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493485451] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:18:18,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123581132] [2023-03-31 22:18:18,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:18:18,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:18:18,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:18:18,185 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:18:18,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 22:18:18,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:18:18,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:18:18,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:18:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 230 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-03-31 22:18:18,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:18:18,599 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 82 proven. 82 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-03-31 22:18:18,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123581132] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:18:18,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [785077304] [2023-03-31 22:18:18,638 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-03-31 22:18:18,638 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:18:18,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:18:18,644 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:18:18,644 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:18:18,792 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs [2023-03-31 22:18:18,956 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 56 [2023-03-31 22:18:19,817 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 50 for LOIs [2023-03-31 22:18:20,003 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 56