/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/Problem03_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:25:31,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:25:31,356 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:25:31,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:25:31,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:25:31,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:25:31,399 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:25:31,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:25:31,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:25:31,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:25:31,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:25:31,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:25:31,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:25:31,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:25:31,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:25:31,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:25:31,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:25:31,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:25:31,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:25:31,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:25:31,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:25:31,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:25:31,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:25:31,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:25:31,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:25:31,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:25:31,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:25:31,439 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:25:31,439 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:25:31,440 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:25:31,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:25:31,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:25:31,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:25:31,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:25:31,444 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:25:31,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:25:31,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:25:31,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:25:31,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:25:31,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:25:31,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:25:31,447 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 09:25:31,476 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:25:31,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:25:31,477 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:25:31,477 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:25:31,478 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:25:31,478 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:25:31,478 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:25:31,478 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:25:31,478 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:25:31,479 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:25:31,479 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:25:31,479 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:25:31,479 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:25:31,480 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:25:31,480 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:25:31,480 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:25:31,480 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:25:31,480 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:25:31,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:25:31,481 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:25:31,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:25:31,481 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:25:31,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:25:31,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:25:31,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:25:31,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:25:31,482 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:25:31,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:25:31,482 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:25:31,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:25:31,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:25:31,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:25:31,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:25:31,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:25:31,483 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:25:31,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:25:31,483 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:25:31,483 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:25:31,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:25:31,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:25:31,484 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:25:31,484 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:25:31,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:25:31,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:25:31,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:25:31,741 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:25:31,742 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:25:31,743 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label35.c [2023-04-01 09:25:32,877 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:25:33,243 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:25:33,243 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label35.c [2023-04-01 09:25:33,261 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef2dc4e7a/4e9d3187d6554f44b547a2af1841b92c/FLAG25b6f1b43 [2023-04-01 09:25:33,278 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef2dc4e7a/4e9d3187d6554f44b547a2af1841b92c [2023-04-01 09:25:33,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:25:33,282 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:25:33,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:25:33,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:25:33,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:25:33,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:25:33" (1/1) ... [2023-04-01 09:25:33,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17172d20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:33, skipping insertion in model container [2023-04-01 09:25:33,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:25:33" (1/1) ... [2023-04-01 09:25:33,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:25:33,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:25:33,789 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/Problem03_label35.c[53787,53800] [2023-04-01 09:25:33,829 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:25:33,842 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:25:34,043 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/Problem03_label35.c[53787,53800] [2023-04-01 09:25:34,076 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:25:34,097 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:25:34,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:34 WrapperNode [2023-04-01 09:25:34,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:25:34,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:25:34,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:25:34,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:25:34,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:34" (1/1) ... [2023-04-01 09:25:34,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:34" (1/1) ... [2023-04-01 09:25:34,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:34" (1/1) ... [2023-04-01 09:25:34,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:34" (1/1) ... [2023-04-01 09:25:34,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:34" (1/1) ... [2023-04-01 09:25:34,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:34" (1/1) ... [2023-04-01 09:25:34,256 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:34" (1/1) ... [2023-04-01 09:25:34,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:34" (1/1) ... [2023-04-01 09:25:34,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:25:34,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:25:34,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:25:34,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:25:34,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:34" (1/1) ... [2023-04-01 09:25:34,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:25:34,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:25:34,326 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 09:25:34,349 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 09:25:34,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:25:34,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:25:34,373 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:25:34,374 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:25:34,374 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:25:34,374 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:25:34,374 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:25:34,374 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:25:34,374 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:25:34,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:25:34,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:25:34,375 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:25:34,375 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:25:34,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:25:34,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:25:34,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:25:34,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:25:34,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:25:34,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:25:34,521 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:25:34,523 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:25:36,038 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:25:36,328 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:25:36,329 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:25:36,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:25:36 BoogieIcfgContainer [2023-04-01 09:25:36,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:25:36,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:25:36,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:25:36,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:25:36,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:25:33" (1/3) ... [2023-04-01 09:25:36,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8df553d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:25:36, skipping insertion in model container [2023-04-01 09:25:36,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:34" (2/3) ... [2023-04-01 09:25:36,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8df553d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:25:36, skipping insertion in model container [2023-04-01 09:25:36,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:25:36" (3/3) ... [2023-04-01 09:25:36,342 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label35.c [2023-04-01 09:25:36,358 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:25:36,359 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:25:36,412 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:25:36,419 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;@2a11197d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:25:36,419 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:25:36,426 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 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 09:25:36,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 09:25:36,445 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:25:36,446 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:25:36,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:25:36,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:25:36,453 INFO L85 PathProgramCache]: Analyzing trace with hash 597444317, now seen corresponding path program 1 times [2023-04-01 09:25:36,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:25:36,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510113172] [2023-04-01 09:25:36,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:25:36,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:25:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:25:37,695 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 09:25:37,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:25:37,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510113172] [2023-04-01 09:25:37,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510113172] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:25:37,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:25:37,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:25:37,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359827423] [2023-04-01 09:25:37,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:25:37,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:25:37,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:25:37,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:25:37,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:25:37,745 INFO L87 Difference]: Start difference. First operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 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 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 09:25:38,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:25:38,483 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-04-01 09:25:38,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:25:38,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 149 [2023-04-01 09:25:38,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:25:38,498 INFO L225 Difference]: With dead ends: 462 [2023-04-01 09:25:38,498 INFO L226 Difference]: Without dead ends: 301 [2023-04-01 09:25:38,502 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 09:25:38,505 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 20 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 09:25:38,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 78 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 09:25:38,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-01 09:25:38,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-04-01 09:25:38,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.9112627986348123) internal successors, (560), 293 states have internal predecessors, (560), 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 09:25:38,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 569 transitions. [2023-04-01 09:25:38,563 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 569 transitions. Word has length 149 [2023-04-01 09:25:38,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:25:38,564 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 569 transitions. [2023-04-01 09:25:38,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 09:25:38,564 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 569 transitions. [2023-04-01 09:25:38,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-01 09:25:38,568 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:25:38,569 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:25:38,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:25:38,569 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:25:38,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:25:38,570 INFO L85 PathProgramCache]: Analyzing trace with hash 316674870, now seen corresponding path program 1 times [2023-04-01 09:25:38,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:25:38,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197766177] [2023-04-01 09:25:38,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:25:38,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:25:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:25:39,114 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 09:25:39,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:25:39,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197766177] [2023-04-01 09:25:39,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197766177] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:25:39,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:25:39,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:25:39,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409370555] [2023-04-01 09:25:39,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:25:39,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:25:39,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:25:39,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:25:39,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:25:39,118 INFO L87 Difference]: Start difference. First operand 301 states and 569 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 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 09:25:39,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:25:39,960 INFO L93 Difference]: Finished difference Result 917 states and 1751 transitions. [2023-04-01 09:25:39,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:25:39,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 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 157 [2023-04-01 09:25:39,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:25:39,968 INFO L225 Difference]: With dead ends: 917 [2023-04-01 09:25:39,968 INFO L226 Difference]: Without dead ends: 621 [2023-04-01 09:25:39,970 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 09:25:39,971 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 530 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 09:25:39,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 43 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 09:25:39,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2023-04-01 09:25:40,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 603. [2023-04-01 09:25:40,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 587 states have (on average 1.737649063032368) internal successors, (1020), 591 states have internal predecessors, (1020), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-04-01 09:25:40,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1047 transitions. [2023-04-01 09:25:40,026 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1047 transitions. Word has length 157 [2023-04-01 09:25:40,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:25:40,027 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 1047 transitions. [2023-04-01 09:25:40,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 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 09:25:40,028 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1047 transitions. [2023-04-01 09:25:40,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-01 09:25:40,033 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:25:40,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:25:40,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:25:40,033 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:25:40,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:25:40,034 INFO L85 PathProgramCache]: Analyzing trace with hash -848638276, now seen corresponding path program 1 times [2023-04-01 09:25:40,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:25:40,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98043398] [2023-04-01 09:25:40,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:25:40,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:25:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:25:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:25:40,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:25:40,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98043398] [2023-04-01 09:25:40,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98043398] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:25:40,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:25:40,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:25:40,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013195759] [2023-04-01 09:25:40,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:25:40,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:25:40,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:25:40,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:25:40,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:25:40,378 INFO L87 Difference]: Start difference. First operand 603 states and 1047 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 09:25:41,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:25:41,258 INFO L93 Difference]: Finished difference Result 1857 states and 3311 transitions. [2023-04-01 09:25:41,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:25:41,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 161 [2023-04-01 09:25:41,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:25:41,271 INFO L225 Difference]: With dead ends: 1857 [2023-04-01 09:25:41,271 INFO L226 Difference]: Without dead ends: 1259 [2023-04-01 09:25:41,276 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 09:25:41,281 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 494 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 09:25:41,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 48 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 09:25:41,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2023-04-01 09:25:41,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1233. [2023-04-01 09:25:41,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1188 states have (on average 1.6885521885521886) internal successors, (2006), 1213 states have internal predecessors, (2006), 10 states have call successors, (10), 10 states have call predecessors, (10), 34 states have return successors, (106), 9 states have call predecessors, (106), 9 states have call successors, (106) [2023-04-01 09:25:41,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 2122 transitions. [2023-04-01 09:25:41,330 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 2122 transitions. Word has length 161 [2023-04-01 09:25:41,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:25:41,330 INFO L495 AbstractCegarLoop]: Abstraction has 1233 states and 2122 transitions. [2023-04-01 09:25:41,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 09:25:41,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 2122 transitions. [2023-04-01 09:25:41,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-04-01 09:25:41,335 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:25:41,335 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:25:41,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 09:25:41,336 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:25:41,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:25:41,336 INFO L85 PathProgramCache]: Analyzing trace with hash 153598783, now seen corresponding path program 1 times [2023-04-01 09:25:41,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:25:41,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108896847] [2023-04-01 09:25:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:25:41,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:25:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:25:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:25:41,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:25:41,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108896847] [2023-04-01 09:25:41,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108896847] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:25:41,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681947058] [2023-04-01 09:25:41,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:25:41,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:25:41,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:25:41,877 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 09:25:41,901 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 09:25:42,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:25:42,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:25:42,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:25:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:25:42,398 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:25:42,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681947058] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:25:42,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:25:42,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 09:25:42,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101882052] [2023-04-01 09:25:42,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:25:42,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:25:42,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:25:42,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:25:42,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 09:25:42,405 INFO L87 Difference]: Start difference. First operand 1233 states and 2122 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:25:43,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:25:43,143 INFO L93 Difference]: Finished difference Result 3683 states and 6528 transitions. [2023-04-01 09:25:43,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:25:43,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 170 [2023-04-01 09:25:43,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:25:43,156 INFO L225 Difference]: With dead ends: 3683 [2023-04-01 09:25:43,156 INFO L226 Difference]: Without dead ends: 2455 [2023-04-01 09:25:43,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 09:25:43,161 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 09:25:43,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 284 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 09:25:43,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2023-04-01 09:25:43,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2455. [2023-04-01 09:25:43,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2455 states, 2371 states have (on average 1.4462252214255589) internal successors, (3429), 2419 states have internal predecessors, (3429), 18 states have call successors, (18), 18 states have call predecessors, (18), 65 states have return successors, (296), 17 states have call predecessors, (296), 17 states have call successors, (296) [2023-04-01 09:25:43,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2455 states to 2455 states and 3743 transitions. [2023-04-01 09:25:43,240 INFO L78 Accepts]: Start accepts. Automaton has 2455 states and 3743 transitions. Word has length 170 [2023-04-01 09:25:43,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:25:43,241 INFO L495 AbstractCegarLoop]: Abstraction has 2455 states and 3743 transitions. [2023-04-01 09:25:43,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:25:43,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2455 states and 3743 transitions. [2023-04-01 09:25:43,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-04-01 09:25:43,252 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:25:43,253 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:25:43,264 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 09:25:43,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:25:43,460 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:25:43,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:25:43,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1298689139, now seen corresponding path program 1 times [2023-04-01 09:25:43,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:25:43,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512023615] [2023-04-01 09:25:43,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:25:43,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:25:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:25:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:25:44,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:25:44,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512023615] [2023-04-01 09:25:44,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512023615] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:25:44,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:25:44,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:25:44,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380593629] [2023-04-01 09:25:44,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:25:44,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:25:44,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:25:44,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:25:44,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:25:44,032 INFO L87 Difference]: Start difference. First operand 2455 states and 3743 transitions. Second operand has 5 states, 5 states have (on average 34.0) internal successors, (170), 4 states have internal predecessors, (170), 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 09:25:45,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:25:45,008 INFO L93 Difference]: Finished difference Result 7489 states and 12085 transitions. [2023-04-01 09:25:45,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:25:45,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 4 states have internal predecessors, (170), 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 176 [2023-04-01 09:25:45,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:25:45,039 INFO L225 Difference]: With dead ends: 7489 [2023-04-01 09:25:45,039 INFO L226 Difference]: Without dead ends: 5039 [2023-04-01 09:25:45,047 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 09:25:45,048 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 467 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 09:25:45,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 40 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 09:25:45,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5039 states. [2023-04-01 09:25:45,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5039 to 4983. [2023-04-01 09:25:45,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4983 states, 4779 states have (on average 1.388784264490479) internal successors, (6637), 4915 states have internal predecessors, (6637), 34 states have call successors, (34), 34 states have call predecessors, (34), 169 states have return successors, (948), 33 states have call predecessors, (948), 33 states have call successors, (948) [2023-04-01 09:25:45,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4983 states to 4983 states and 7619 transitions. [2023-04-01 09:25:45,257 INFO L78 Accepts]: Start accepts. Automaton has 4983 states and 7619 transitions. Word has length 176 [2023-04-01 09:25:45,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:25:45,257 INFO L495 AbstractCegarLoop]: Abstraction has 4983 states and 7619 transitions. [2023-04-01 09:25:45,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 4 states have internal predecessors, (170), 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 09:25:45,258 INFO L276 IsEmpty]: Start isEmpty. Operand 4983 states and 7619 transitions. [2023-04-01 09:25:45,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-04-01 09:25:45,271 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:25:45,271 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:25:45,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 09:25:45,272 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:25:45,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:25:45,273 INFO L85 PathProgramCache]: Analyzing trace with hash 254654696, now seen corresponding path program 1 times [2023-04-01 09:25:45,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:25:45,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602874913] [2023-04-01 09:25:45,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:25:45,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:25:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:25:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 09:25:45,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:25:45,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602874913] [2023-04-01 09:25:45,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602874913] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:25:45,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567157914] [2023-04-01 09:25:45,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:25:45,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:25:45,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:25:45,663 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 09:25:45,691 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 09:25:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:25:45,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 1024 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 09:25:45,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:25:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:25:45,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:25:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:25:46,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567157914] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:25:46,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1003532083] [2023-04-01 09:25:46,234 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-04-01 09:25:46,234 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:25:46,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:25:46,242 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:25:46,242 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:25:47,613 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 194 for LOIs