/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 EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem02_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:21:10,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:21:10,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:21:10,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:21:10,326 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:21:10,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:21:10,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:21:10,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:21:10,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:21:10,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:21:10,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:21:10,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:21:10,333 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:21:10,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:21:10,334 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:21:10,335 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:21:10,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:21:10,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:21:10,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:21:10,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:21:10,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:21:10,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:21:10,348 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:21:10,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:21:10,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:21:10,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:21:10,358 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:21:10,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:21:10,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:21:10,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:21:10,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:21:10,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:21:10,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:21:10,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:21:10,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:21:10,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:21:10,361 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:21:10,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:21:10,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:21:10,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:21:10,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:21:10,363 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 09:21:10,377 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:21:10,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:21:10,377 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:21:10,377 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:21:10,377 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:21:10,378 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:21:10,378 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:21:10,378 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:21:10,378 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:21:10,378 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:21:10,378 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:21:10,378 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:21:10,378 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:21:10,379 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:21:10,379 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:21:10,379 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:21:10,379 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:21:10,379 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:21:10,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:21:10,380 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:21:10,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:21:10,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:21:10,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:21:10,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:21:10,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:21:10,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:21:10,383 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:21:10,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:21:10,383 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:21:10,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:21:10,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:21:10,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:21:10,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:21:10,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:21:10,384 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:21:10,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:21:10,384 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:21:10,384 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:21:10,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:21:10,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:21:10,384 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:21:10,384 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:21:10,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:21:10,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:21:10,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:21:10,602 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:21:10,603 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:21:10,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label43.c [2023-04-01 09:21:11,588 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:21:11,842 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:21:11,843 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label43.c [2023-04-01 09:21:11,860 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae0687c40/4bdc2501626d4bbab74b0ebc0720a6a7/FLAG44a7081df [2023-04-01 09:21:11,870 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae0687c40/4bdc2501626d4bbab74b0ebc0720a6a7 [2023-04-01 09:21:11,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:21:11,873 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:21:11,874 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:21:11,874 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:21:11,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:21:11,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:21:11" (1/1) ... [2023-04-01 09:21:11,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79236a1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:11, skipping insertion in model container [2023-04-01 09:21:11,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:21:11" (1/1) ... [2023-04-01 09:21:11,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:21:11,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:21:12,158 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_label43.c[15084,15097] [2023-04-01 09:21:12,183 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:21:12,190 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:21:12,238 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_label43.c[15084,15097] [2023-04-01 09:21:12,267 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:21:12,276 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:21:12,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:12 WrapperNode [2023-04-01 09:21:12,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:21:12,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:21:12,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:21:12,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:21:12,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:12" (1/1) ... [2023-04-01 09:21:12,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:12" (1/1) ... [2023-04-01 09:21:12,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:12" (1/1) ... [2023-04-01 09:21:12,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:12" (1/1) ... [2023-04-01 09:21:12,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:12" (1/1) ... [2023-04-01 09:21:12,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:12" (1/1) ... [2023-04-01 09:21:12,352 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:12" (1/1) ... [2023-04-01 09:21:12,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:12" (1/1) ... [2023-04-01 09:21:12,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:21:12,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:21:12,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:21:12,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:21:12,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:12" (1/1) ... [2023-04-01 09:21:12,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:21:12,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:21:12,394 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 09:21:12,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 09:21:12,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:21:12,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:21:12,424 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:21:12,424 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:21:12,424 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:21:12,424 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:21:12,424 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:21:12,424 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:21:12,424 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:21:12,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:21:12,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:21:12,424 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:21:12,424 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:21:12,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:21:12,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:21:12,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:21:12,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:21:12,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:21:12,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:21:12,495 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:21:12,497 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:21:13,331 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:21:13,505 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:21:13,505 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:21:13,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:21:13 BoogieIcfgContainer [2023-04-01 09:21:13,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:21:13,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:21:13,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:21:13,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:21:13,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:21:11" (1/3) ... [2023-04-01 09:21:13,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25bd31f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:21:13, skipping insertion in model container [2023-04-01 09:21:13,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:21:12" (2/3) ... [2023-04-01 09:21:13,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25bd31f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:21:13, skipping insertion in model container [2023-04-01 09:21:13,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:21:13" (3/3) ... [2023-04-01 09:21:13,519 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label43.c [2023-04-01 09:21:13,532 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:21:13,532 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:21:13,568 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:21:13,572 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;@40049ef5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:21:13,572 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:21:13,576 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) [2023-04-01 09:21:13,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 09:21:13,584 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:21:13,585 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] [2023-04-01 09:21:13,585 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:21:13,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:21:13,589 INFO L85 PathProgramCache]: Analyzing trace with hash -818173609, now seen corresponding path program 1 times [2023-04-01 09:21:13,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:21:13,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340387074] [2023-04-01 09:21:13,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:21:13,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:21:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:21:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:21:14,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:21:14,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340387074] [2023-04-01 09:21:14,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340387074] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:21:14,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:21:14,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:21:14,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762030121] [2023-04-01 09:21:14,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:21:14,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:21:14,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:21:14,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:21:14,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:21:14,081 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) [2023-04-01 09:21:14,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:21:14,445 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-04-01 09:21:14,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:21:14,447 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 [2023-04-01 09:21:14,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:21:14,458 INFO L225 Difference]: With dead ends: 273 [2023-04-01 09:21:14,458 INFO L226 Difference]: Without dead ends: 175 [2023-04-01 09:21:14,461 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 [2023-04-01 09:21:14,464 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 23 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:21:14,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 47 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:21:14,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-04-01 09:21:14,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-04-01 09:21:14,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.81437125748503) internal successors, (303), 167 states have internal predecessors, (303), 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) [2023-04-01 09:21:14,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2023-04-01 09:21:14,524 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2023-04-01 09:21:14,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:21:14,525 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2023-04-01 09:21:14,526 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) [2023-04-01 09:21:14,526 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2023-04-01 09:21:14,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 09:21:14,534 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:21:14,534 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:21:14,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:21:14,535 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:21:14,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:21:14,536 INFO L85 PathProgramCache]: Analyzing trace with hash 363549219, now seen corresponding path program 1 times [2023-04-01 09:21:14,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:21:14,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648780276] [2023-04-01 09:21:14,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:21:14,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:21:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:21:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:21:15,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:21:15,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648780276] [2023-04-01 09:21:15,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648780276] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:21:15,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:21:15,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:21:15,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423459034] [2023-04-01 09:21:15,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:21:15,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:21:15,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:21:15,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:21:15,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:21:15,046 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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) [2023-04-01 09:21:15,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:21:15,441 INFO L93 Difference]: Finished difference Result 535 states and 973 transitions. [2023-04-01 09:21:15,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:21:15,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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 94 [2023-04-01 09:21:15,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:21:15,444 INFO L225 Difference]: With dead ends: 535 [2023-04-01 09:21:15,444 INFO L226 Difference]: Without dead ends: 365 [2023-04-01 09:21:15,445 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 [2023-04-01 09:21:15,446 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 270 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:21:15,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 46 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:21:15,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-04-01 09:21:15,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 357. [2023-04-01 09:21:15,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 338 states have (on average 1.6124260355029585) internal successors, (545), 345 states have internal predecessors, (545), 6 states have call successors, (6), 6 states have call predecessors, (6), 12 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2023-04-01 09:21:15,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 580 transitions. [2023-04-01 09:21:15,468 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 580 transitions. Word has length 94 [2023-04-01 09:21:15,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:21:15,468 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 580 transitions. [2023-04-01 09:21:15,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 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) [2023-04-01 09:21:15,469 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 580 transitions. [2023-04-01 09:21:15,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-01 09:21:15,472 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:21:15,472 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:21:15,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:21:15,472 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:21:15,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:21:15,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1834606327, now seen corresponding path program 1 times [2023-04-01 09:21:15,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:21:15,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277014424] [2023-04-01 09:21:15,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:21:15,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:21:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:21:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 09:21:15,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:21:15,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277014424] [2023-04-01 09:21:15,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277014424] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:21:15,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407442572] [2023-04-01 09:21:15,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:21:15,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:21:15,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:21:15,657 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:21:15,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 09:21:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:21:15,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:21:15,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:21:15,849 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 09:21:15,849 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:21:15,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407442572] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:21:15,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:21:15,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 09:21:15,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044793634] [2023-04-01 09:21:15,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:21:15,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:21:15,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:21:15,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:21:15,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:21:15,851 INFO L87 Difference]: Start difference. First operand 357 states and 580 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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) [2023-04-01 09:21:16,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:21:16,247 INFO L93 Difference]: Finished difference Result 907 states and 1505 transitions. [2023-04-01 09:21:16,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 09:21:16,247 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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 106 [2023-04-01 09:21:16,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:21:16,250 INFO L225 Difference]: With dead ends: 907 [2023-04-01 09:21:16,251 INFO L226 Difference]: Without dead ends: 555 [2023-04-01 09:21:16,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 09:21:16,255 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 248 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:21:16,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 42 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:21:16,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2023-04-01 09:21:16,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 541. [2023-04-01 09:21:16,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 510 states have (on average 1.464705882352941) internal successors, (747), 525 states have internal predecessors, (747), 8 states have call successors, (8), 8 states have call predecessors, (8), 22 states have return successors, (64), 7 states have call predecessors, (64), 7 states have call successors, (64) [2023-04-01 09:21:16,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 819 transitions. [2023-04-01 09:21:16,300 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 819 transitions. Word has length 106 [2023-04-01 09:21:16,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:21:16,300 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 819 transitions. [2023-04-01 09:21:16,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 4 states have internal predecessors, (94), 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) [2023-04-01 09:21:16,300 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 819 transitions. [2023-04-01 09:21:16,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-01 09:21:16,302 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:21:16,302 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:21:16,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 09:21:16,510 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 [2023-04-01 09:21:16,510 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:21:16,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:21:16,511 INFO L85 PathProgramCache]: Analyzing trace with hash 856773607, now seen corresponding path program 1 times [2023-04-01 09:21:16,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:21:16,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372668279] [2023-04-01 09:21:16,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:21:16,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:21:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:21:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:21:16,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:21:16,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372668279] [2023-04-01 09:21:16,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372668279] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:21:16,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123394373] [2023-04-01 09:21:16,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:21:16,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:21:16,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:21:16,711 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:21:16,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 09:21:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:21:16,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 09:21:16,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:21:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:21:16,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:21:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:21:17,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123394373] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:21:17,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1425235781] [2023-04-01 09:21:17,119 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-04-01 09:21:17,120 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:21:17,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:21:17,126 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:21:17,127 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:21:17,439 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 98 for LOIs