/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem03_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:21:03,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:21:03,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:21:03,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:21:03,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:21:03,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:21:03,409 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:21:03,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:21:03,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:21:03,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:21:03,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:21:03,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:21:03,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:21:03,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:21:03,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:21:03,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:21:03,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:21:03,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:21:03,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:21:03,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:21:03,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:21:03,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:21:03,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:21:03,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:21:03,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:21:03,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:21:03,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:21:03,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:21:03,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:21:03,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:21:03,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:21:03,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:21:03,440 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:21:03,446 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:21:03,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:21:03,448 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:21:03,448 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:21:03,448 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:21:03,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:21:03,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:21:03,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:21:03,453 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 21:21:03,492 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:21:03,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:21:03,493 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:21:03,493 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:21:03,494 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:21:03,494 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:21:03,494 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:21:03,494 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:21:03,494 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:21:03,494 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:21:03,495 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:21:03,495 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:21:03,495 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:21:03,495 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:21:03,496 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:21:03,496 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:21:03,496 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:21:03,496 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:21:03,497 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:21:03,497 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:21:03,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:21:03,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:21:03,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:21:03,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:21:03,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:21:03,497 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:21:03,497 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:21:03,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:21:03,498 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:21:03,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:21:03,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:21:03,498 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:21:03,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:21:03,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:21:03,499 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:21:03,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:21:03,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:21:03,499 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:21:03,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:21:03,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:21:03,499 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:21:03,499 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:21:03,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:21:03,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:21:03,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:21:03,745 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:21:03,745 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:21:03,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label42.c [2023-03-31 21:21:04,831 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:21:05,176 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:21:05,177 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label42.c [2023-03-31 21:21:05,196 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a41a752f/98b1ada63aaa4e7aae44576e5fefe966/FLAG072476acd [2023-03-31 21:21:05,212 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a41a752f/98b1ada63aaa4e7aae44576e5fefe966 [2023-03-31 21:21:05,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:21:05,216 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:21:05,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:21:05,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:21:05,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:21:05,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:21:05" (1/1) ... [2023-03-31 21:21:05,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55044b0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:05, skipping insertion in model container [2023-03-31 21:21:05,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:21:05" (1/1) ... [2023-03-31 21:21:05,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:21:05,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:21:05,731 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_label42.c[60691,60704] [2023-03-31 21:21:05,759 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:21:05,767 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:21:05,954 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_label42.c[60691,60704] [2023-03-31 21:21:05,963 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:21:05,984 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:21:05,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:05 WrapperNode [2023-03-31 21:21:05,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:21:05,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:21:05,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:21:05,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:21:05,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:05" (1/1) ... [2023-03-31 21:21:05,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:05" (1/1) ... [2023-03-31 21:21:06,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:05" (1/1) ... [2023-03-31 21:21:06,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:05" (1/1) ... [2023-03-31 21:21:06,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:05" (1/1) ... [2023-03-31 21:21:06,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:05" (1/1) ... [2023-03-31 21:21:06,128 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:05" (1/1) ... [2023-03-31 21:21:06,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:05" (1/1) ... [2023-03-31 21:21:06,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:21:06,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:21:06,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:21:06,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:21:06,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:05" (1/1) ... [2023-03-31 21:21:06,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:21:06,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:21:06,186 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 21:21:06,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 21:21:06,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:21:06,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:21:06,225 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:21:06,225 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:21:06,225 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:21:06,225 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:21:06,225 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:21:06,225 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:21:06,225 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:21:06,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:21:06,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:21:06,226 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:21:06,226 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:21:06,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:21:06,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:21:06,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:21:06,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:21:06,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:21:06,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:21:06,323 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:21:06,325 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:21:07,919 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:21:08,235 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:21:08,235 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:21:08,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:21:08 BoogieIcfgContainer [2023-03-31 21:21:08,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:21:08,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:21:08,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:21:08,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:21:08,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:21:05" (1/3) ... [2023-03-31 21:21:08,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bcdb64f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:21:08, skipping insertion in model container [2023-03-31 21:21:08,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:21:05" (2/3) ... [2023-03-31 21:21:08,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bcdb64f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:21:08, skipping insertion in model container [2023-03-31 21:21:08,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:21:08" (3/3) ... [2023-03-31 21:21:08,246 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label42.c [2023-03-31 21:21:08,261 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:21:08,261 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:21:08,321 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:21:08,327 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;@1cbc7657, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:21:08,328 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:21:08,334 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) [2023-03-31 21:21:08,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-03-31 21:21:08,351 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:21:08,352 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] [2023-03-31 21:21:08,353 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:21:08,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:21:08,359 INFO L85 PathProgramCache]: Analyzing trace with hash 597542902, now seen corresponding path program 1 times [2023-03-31 21:21:08,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:21:08,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051802282] [2023-03-31 21:21:08,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:21:08,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:21:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:21:09,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:21:09,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:21:09,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051802282] [2023-03-31 21:21:09,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051802282] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:21:09,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:21:09,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:21:09,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524108330] [2023-03-31 21:21:09,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:21:09,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:21:09,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:21:09,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:21:09,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:21:09,485 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) [2023-03-31 21:21:10,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:21:10,244 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-03-31 21:21:10,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:21:10,247 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 [2023-03-31 21:21:10,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:21:10,258 INFO L225 Difference]: With dead ends: 462 [2023-03-31 21:21:10,258 INFO L226 Difference]: Without dead ends: 301 [2023-03-31 21:21:10,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:21:10,264 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 43 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 21:21:10,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 70 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 21:21:10,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-03-31 21:21:10,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-03-31 21:21:10,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.795221843003413) internal successors, (526), 293 states have internal predecessors, (526), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 21:21:10,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 535 transitions. [2023-03-31 21:21:10,321 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 535 transitions. Word has length 149 [2023-03-31 21:21:10,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:21:10,322 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 535 transitions. [2023-03-31 21:21:10,322 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) [2023-03-31 21:21:10,322 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 535 transitions. [2023-03-31 21:21:10,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-03-31 21:21:10,326 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:21:10,326 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] [2023-03-31 21:21:10,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:21:10,327 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:21:10,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:21:10,328 INFO L85 PathProgramCache]: Analyzing trace with hash -848539691, now seen corresponding path program 1 times [2023-03-31 21:21:10,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:21:10,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916251223] [2023-03-31 21:21:10,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:21:10,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:21:10,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:21:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:21:10,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:21:10,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916251223] [2023-03-31 21:21:10,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916251223] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:21:10,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:21:10,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:21:10,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315533945] [2023-03-31 21:21:10,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:21:10,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:21:10,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:21:10,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:21:10,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:21:10,794 INFO L87 Difference]: Start difference. First operand 301 states and 535 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) [2023-03-31 21:21:11,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:21:11,629 INFO L93 Difference]: Finished difference Result 917 states and 1649 transitions. [2023-03-31 21:21:11,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:21:11,633 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 [2023-03-31 21:21:11,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:21:11,638 INFO L225 Difference]: With dead ends: 917 [2023-03-31 21:21:11,639 INFO L226 Difference]: Without dead ends: 621 [2023-03-31 21:21:11,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:21:11,642 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 491 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 44 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 [2023-03-31 21:21:11,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 44 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-31 21:21:11,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2023-03-31 21:21:11,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 609. [2023-03-31 21:21:11,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 590 states have (on average 1.7457627118644068) internal successors, (1030), 597 states have internal predecessors, (1030), 6 states have call successors, (6), 6 states have call predecessors, (6), 12 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2023-03-31 21:21:11,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 1063 transitions. [2023-03-31 21:21:11,679 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 1063 transitions. Word has length 161 [2023-03-31 21:21:11,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:21:11,679 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 1063 transitions. [2023-03-31 21:21:11,680 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) [2023-03-31 21:21:11,680 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 1063 transitions. [2023-03-31 21:21:11,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-03-31 21:21:11,684 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:21:11,685 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2023-03-31 21:21:11,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:21:11,685 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:21:11,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:21:11,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1858941152, now seen corresponding path program 1 times [2023-03-31 21:21:11,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:21:11,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274171294] [2023-03-31 21:21:11,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:21:11,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:21:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:21:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:21:12,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:21:12,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274171294] [2023-03-31 21:21:12,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274171294] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:21:12,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:21:12,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:21:12,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547545238] [2023-03-31 21:21:12,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:21:12,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:21:12,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:21:12,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:21:12,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:21:12,197 INFO L87 Difference]: Start difference. First operand 609 states and 1063 transitions. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 4 states have internal predecessors, (160), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:21:12,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:21:12,970 INFO L93 Difference]: Finished difference Result 1897 states and 3405 transitions. [2023-03-31 21:21:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:21:12,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 4 states have internal predecessors, (160), 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 166 [2023-03-31 21:21:12,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:21:12,979 INFO L225 Difference]: With dead ends: 1897 [2023-03-31 21:21:12,979 INFO L226 Difference]: Without dead ends: 1293 [2023-03-31 21:21:12,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:21:12,983 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 518 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 21:21:12,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 44 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 21:21:12,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2023-03-31 21:21:13,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1249. [2023-03-31 21:21:13,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1196 states have (on average 1.6137123745819397) internal successors, (1930), 1229 states have internal predecessors, (1930), 10 states have call successors, (10), 10 states have call predecessors, (10), 42 states have return successors, (116), 9 states have call predecessors, (116), 9 states have call successors, (116) [2023-03-31 21:21:13,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 2056 transitions. [2023-03-31 21:21:13,059 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 2056 transitions. Word has length 166 [2023-03-31 21:21:13,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:21:13,059 INFO L495 AbstractCegarLoop]: Abstraction has 1249 states and 2056 transitions. [2023-03-31 21:21:13,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 4 states have internal predecessors, (160), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:21:13,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 2056 transitions. [2023-03-31 21:21:13,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-03-31 21:21:13,068 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:21:13,068 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:21:13,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 21:21:13,068 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:21:13,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:21:13,069 INFO L85 PathProgramCache]: Analyzing trace with hash -614910784, now seen corresponding path program 1 times [2023-03-31 21:21:13,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:21:13,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361236738] [2023-03-31 21:21:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:21:13,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:21:13,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:21:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:21:13,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:21:13,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361236738] [2023-03-31 21:21:13,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361236738] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:21:13,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:21:13,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:21:13,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947464045] [2023-03-31 21:21:13,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:21:13,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:21:13,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:21:13,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:21:13,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:21:13,519 INFO L87 Difference]: Start difference. First operand 1249 states and 2056 transitions. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:21:14,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:21:14,359 INFO L93 Difference]: Finished difference Result 3893 states and 6778 transitions. [2023-03-31 21:21:14,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 21:21:14,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 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 171 [2023-03-31 21:21:14,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:21:14,375 INFO L225 Difference]: With dead ends: 3893 [2023-03-31 21:21:14,375 INFO L226 Difference]: Without dead ends: 2649 [2023-03-31 21:21:14,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:21:14,380 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 526 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 21:21:14,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 43 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 21:21:14,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2023-03-31 21:21:14,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 2575. [2023-03-31 21:21:14,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2575 states, 2431 states have (on average 1.514191690662279) internal successors, (3681), 2539 states have internal predecessors, (3681), 18 states have call successors, (18), 18 states have call predecessors, (18), 125 states have return successors, (401), 17 states have call predecessors, (401), 17 states have call successors, (401) [2023-03-31 21:21:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 4100 transitions. [2023-03-31 21:21:14,516 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 4100 transitions. Word has length 171 [2023-03-31 21:21:14,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:21:14,518 INFO L495 AbstractCegarLoop]: Abstraction has 2575 states and 4100 transitions. [2023-03-31 21:21:14,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:21:14,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 4100 transitions. [2023-03-31 21:21:14,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-03-31 21:21:14,527 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:21:14,528 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2023-03-31 21:21:14,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 21:21:14,529 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:21:14,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:21:14,529 INFO L85 PathProgramCache]: Analyzing trace with hash -215732594, now seen corresponding path program 1 times [2023-03-31 21:21:14,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:21:14,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160413506] [2023-03-31 21:21:14,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:21:14,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:21:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:21:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:21:14,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:21:14,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160413506] [2023-03-31 21:21:14,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160413506] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:21:14,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187995695] [2023-03-31 21:21:14,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:21:14,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:21:14,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:21:14,952 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:21:14,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 21:21:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:21:15,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 21:21:15,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:21:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:21:15,442 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:21:15,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187995695] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:21:15,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:21:15,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 21:21:15,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751710067] [2023-03-31 21:21:15,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:21:15,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:21:15,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:21:15,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:21:15,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:21:15,444 INFO L87 Difference]: Start difference. First operand 2575 states and 4100 transitions. Second operand has 5 states, 5 states have (on average 33.4) internal successors, (167), 4 states have internal predecessors, (167), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 21:21:15,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:21:15,888 INFO L93 Difference]: Finished difference Result 7843 states and 13140 transitions. [2023-03-31 21:21:15,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 21:21:15,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.4) internal successors, (167), 4 states have internal predecessors, (167), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 179 [2023-03-31 21:21:15,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:21:15,920 INFO L225 Difference]: With dead ends: 7843 [2023-03-31 21:21:15,921 INFO L226 Difference]: Without dead ends: 5273 [2023-03-31 21:21:15,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-03-31 21:21:15,929 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 759 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:21:15,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 563 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 21:21:15,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5273 states. [2023-03-31 21:21:16,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5273 to 5199. [2023-03-31 21:21:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5199 states, 4887 states have (on average 1.510742786985881) internal successors, (7383), 5131 states have internal predecessors, (7383), 34 states have call successors, (34), 34 states have call predecessors, (34), 277 states have return successors, (1025), 33 states have call predecessors, (1025), 33 states have call successors, (1025) [2023-03-31 21:21:16,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5199 states to 5199 states and 8442 transitions. [2023-03-31 21:21:16,107 INFO L78 Accepts]: Start accepts. Automaton has 5199 states and 8442 transitions. Word has length 179 [2023-03-31 21:21:16,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:21:16,108 INFO L495 AbstractCegarLoop]: Abstraction has 5199 states and 8442 transitions. [2023-03-31 21:21:16,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.4) internal successors, (167), 4 states have internal predecessors, (167), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 21:21:16,108 INFO L276 IsEmpty]: Start isEmpty. Operand 5199 states and 8442 transitions. [2023-03-31 21:21:16,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-03-31 21:21:16,121 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:21:16,121 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 21:21:16,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 21:21:16,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:21:16,330 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:21:16,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:21:16,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1395150422, now seen corresponding path program 1 times [2023-03-31 21:21:16,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:21:16,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198356416] [2023-03-31 21:21:16,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:21:16,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:21:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:21:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:21:16,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:21:16,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198356416] [2023-03-31 21:21:16,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198356416] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:21:16,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676218222] [2023-03-31 21:21:16,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:21:16,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:21:16,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:21:16,899 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:21:16,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 21:21:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:21:17,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:21:17,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:21:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:21:17,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:21:17,317 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:21:17,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676218222] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:21:17,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1199200963] [2023-03-31 21:21:17,350 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-03-31 21:21:17,350 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:21:17,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:21:17,359 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:21:17,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:21:18,044 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-03-31 21:21:20,394 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 148 for LOIs