/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem02_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:20:45,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:20:45,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:20:45,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:20:45,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:20:45,223 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:20:45,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:20:45,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:20:45,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:20:45,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:20:45,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:20:45,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:20:45,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:20:45,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:20:45,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:20:45,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:20:45,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:20:45,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:20:45,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:20:45,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:20:45,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:20:45,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:20:45,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:20:45,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:20:45,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:20:45,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:20:45,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:20:45,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:20:45,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:20:45,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:20:45,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:20:45,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:20:45,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:20:45,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:20:45,258 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:20:45,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:20:45,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:20:45,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:20:45,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:20:45,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:20:45,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:20:45,269 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 09:20:45,296 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:20:45,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:20:45,296 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:20:45,296 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:20:45,297 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:20:45,297 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:20:45,297 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:20:45,297 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:20:45,298 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:20:45,298 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:20:45,298 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:20:45,298 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:20:45,298 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:20:45,298 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:20:45,298 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:20:45,299 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:20:45,299 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:20:45,299 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:20:45,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:20:45,299 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:20:45,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:20:45,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:20:45,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:20:45,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:20:45,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:20:45,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:20:45,300 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:20:45,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:20:45,300 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:20:45,301 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:20:45,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:20:45,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:20:45,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:20:45,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:20:45,301 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:20:45,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:20:45,302 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:20:45,302 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:20:45,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:20:45,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:20:45,302 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:20:45,302 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:20:45,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:20:45,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:20:45,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:20:45,547 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:20:45,547 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:20:45,548 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem02_label37.c [2023-04-01 09:20:46,763 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:20:47,041 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:20:47,042 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label37.c [2023-04-01 09:20:47,051 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/260502572/5f6a80d4dfcd48bab324d11b81737c77/FLAG885b50b8b [2023-04-01 09:20:47,061 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/260502572/5f6a80d4dfcd48bab324d11b81737c77 [2023-04-01 09:20:47,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:20:47,064 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:20:47,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:20:47,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:20:47,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:20:47,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:20:47" (1/1) ... [2023-04-01 09:20:47,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fb10a7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:20:47, skipping insertion in model container [2023-04-01 09:20:47,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:20:47" (1/1) ... [2023-04-01 09:20:47,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:20:47,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:20:47,387 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label37.c[19058,19071] [2023-04-01 09:20:47,433 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:20:47,449 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:20:47,560 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem02_label37.c[19058,19071] [2023-04-01 09:20:47,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:20:47,596 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:20:47,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:20:47 WrapperNode [2023-04-01 09:20:47,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:20:47,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:20:47,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:20:47,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:20:47,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:20:47" (1/1) ... [2023-04-01 09:20:47,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:20:47" (1/1) ... [2023-04-01 09:20:47,625 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:20:47" (1/1) ... [2023-04-01 09:20:47,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:20:47" (1/1) ... [2023-04-01 09:20:47,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:20:47" (1/1) ... [2023-04-01 09:20:47,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:20:47" (1/1) ... [2023-04-01 09:20:47,674 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:20:47" (1/1) ... [2023-04-01 09:20:47,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:20:47" (1/1) ... [2023-04-01 09:20:47,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:20:47,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:20:47,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:20:47,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:20:47,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:20:47" (1/1) ... [2023-04-01 09:20:47,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:20:47,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:20:47,722 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 09:20:47,745 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 09:20:47,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:20:47,762 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:20:47,762 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:20:47,763 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:20:47,764 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:20:47,764 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:20:47,764 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:20:47,764 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:20:47,764 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:20:47,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:20:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:20:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:20:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:20:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:20:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:20:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:20:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:20:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:20:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:20:47,851 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:20:47,853 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:20:48,769 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:20:49,036 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:20:49,036 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:20:49,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:20:49 BoogieIcfgContainer [2023-04-01 09:20:49,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:20:49,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:20:49,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:20:49,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:20:49,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:20:47" (1/3) ... [2023-04-01 09:20:49,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58669b6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:20:49, skipping insertion in model container [2023-04-01 09:20:49,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:20:47" (2/3) ... [2023-04-01 09:20:49,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58669b6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:20:49, skipping insertion in model container [2023-04-01 09:20:49,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:20:49" (3/3) ... [2023-04-01 09:20:49,048 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem02_label37.c [2023-04-01 09:20:49,064 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:20:49,064 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:20:49,115 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:20:49,121 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;@3f37d04f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:20:49,122 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:20:49,125 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:20:49,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 09:20:49,132 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:20:49,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:20:49,133 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:20:49,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:20:49,139 INFO L85 PathProgramCache]: Analyzing trace with hash -818164649, now seen corresponding path program 1 times [2023-04-01 09:20:49,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:20:49,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927668417] [2023-04-01 09:20:49,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:20:49,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:20:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:20:49,760 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 09:20:49,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:20:49,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927668417] [2023-04-01 09:20:49,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927668417] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:20:49,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:20:49,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:20:49,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577063276] [2023-04-01 09:20:49,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:20:49,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:20:49,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:20:49,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:20:49,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:20:49,808 INFO L87 Difference]: Start difference. First operand has 95 states, 87 states have (on average 1.9080459770114941) internal successors, (166), 88 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:20:50,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:20:50,197 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2023-04-01 09:20:50,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:20:50,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2023-04-01 09:20:50,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:20:50,213 INFO L225 Difference]: With dead ends: 273 [2023-04-01 09:20:50,213 INFO L226 Difference]: Without dead ends: 175 [2023-04-01 09:20:50,218 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 09:20:50,221 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 25 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:20:50,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 76 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:20:50,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-04-01 09:20:50,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2023-04-01 09:20:50,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 167 states have (on average 1.81437125748503) internal successors, (303), 167 states have internal predecessors, (303), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 09:20:50,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2023-04-01 09:20:50,274 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2023-04-01 09:20:50,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:20:50,275 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2023-04-01 09:20:50,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:20:50,275 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2023-04-01 09:20:50,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-04-01 09:20:50,279 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:20:50,279 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:20:50,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:20:50,280 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:20:50,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:20:50,281 INFO L85 PathProgramCache]: Analyzing trace with hash 363558179, now seen corresponding path program 1 times [2023-04-01 09:20:50,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:20:50,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601872241] [2023-04-01 09:20:50,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:20:50,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:20:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:20:50,866 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 09:20:50,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:20:50,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601872241] [2023-04-01 09:20:50,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601872241] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:20:50,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:20:50,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:20:50,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441306665] [2023-04-01 09:20:50,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:20:50,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:20:50,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:20:50,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:20:50,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:20:50,870 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:20:51,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:20:51,375 INFO L93 Difference]: Finished difference Result 535 states and 970 transitions. [2023-04-01 09:20:51,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:20:51,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 94 [2023-04-01 09:20:51,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:20:51,389 INFO L225 Difference]: With dead ends: 535 [2023-04-01 09:20:51,389 INFO L226 Difference]: Without dead ends: 365 [2023-04-01 09:20:51,396 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 09:20:51,397 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 266 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:20:51,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 47 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:20:51,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-04-01 09:20:51,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 359. [2023-04-01 09:20:51,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 339 states have (on average 1.6371681415929205) internal successors, (555), 347 states have internal predecessors, (555), 6 states have call successors, (6), 6 states have call predecessors, (6), 13 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2023-04-01 09:20:51,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 590 transitions. [2023-04-01 09:20:51,429 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 590 transitions. Word has length 94 [2023-04-01 09:20:51,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:20:51,429 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 590 transitions. [2023-04-01 09:20:51,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:20:51,430 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 590 transitions. [2023-04-01 09:20:51,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-04-01 09:20:51,434 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:20:51,434 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 09:20:51,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:20:51,434 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:20:51,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:20:51,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1209127451, now seen corresponding path program 1 times [2023-04-01 09:20:51,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:20:51,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006113869] [2023-04-01 09:20:51,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:20:51,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:20:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:20:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 09:20:51,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:20:51,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006113869] [2023-04-01 09:20:51,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006113869] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:20:51,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393316048] [2023-04-01 09:20:51,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:20:51,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:20:51,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:20:51,685 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 09:20:51,689 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 09:20:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:20:51,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:20:51,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:20:51,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:20:51,934 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:20:51,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393316048] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:20:51,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:20:51,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 09:20:51,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694602807] [2023-04-01 09:20:51,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:20:51,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:20:51,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:20:51,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:20:51,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:20:51,937 INFO L87 Difference]: Start difference. First operand 359 states and 590 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 09:20:52,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:20:52,255 INFO L93 Difference]: Finished difference Result 711 states and 1222 transitions. [2023-04-01 09:20:52,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:20:52,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 99 [2023-04-01 09:20:52,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:20:52,263 INFO L225 Difference]: With dead ends: 711 [2023-04-01 09:20:52,263 INFO L226 Difference]: Without dead ends: 709 [2023-04-01 09:20:52,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:20:52,266 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:20:52,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 22 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:20:52,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2023-04-01 09:20:52,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 447. [2023-04-01 09:20:52,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 423 states have (on average 1.6879432624113475) internal successors, (714), 433 states have internal predecessors, (714), 7 states have call successors, (7), 7 states have call predecessors, (7), 16 states have return successors, (47), 6 states have call predecessors, (47), 6 states have call successors, (47) [2023-04-01 09:20:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 768 transitions. [2023-04-01 09:20:52,308 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 768 transitions. Word has length 99 [2023-04-01 09:20:52,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:20:52,310 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 768 transitions. [2023-04-01 09:20:52,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 09:20:52,310 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 768 transitions. [2023-04-01 09:20:52,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-01 09:20:52,323 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:20:52,324 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 09:20:52,335 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 09:20:52,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:20:52,531 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:20:52,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:20:52,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1159817887, now seen corresponding path program 1 times [2023-04-01 09:20:52,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:20:52,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120758024] [2023-04-01 09:20:52,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:20:52,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:20:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:20:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:20:52,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:20:52,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120758024] [2023-04-01 09:20:52,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120758024] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:20:52,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:20:52,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:20:52,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827382312] [2023-04-01 09:20:52,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:20:52,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:20:52,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:20:52,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:20:52,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:20:52,725 INFO L87 Difference]: Start difference. First operand 447 states and 768 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 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 09:20:53,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:20:53,090 INFO L93 Difference]: Finished difference Result 1191 states and 2174 transitions. [2023-04-01 09:20:53,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:20:53,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 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 101 [2023-04-01 09:20:53,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:20:53,095 INFO L225 Difference]: With dead ends: 1191 [2023-04-01 09:20:53,095 INFO L226 Difference]: Without dead ends: 749 [2023-04-01 09:20:53,096 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 09:20:53,109 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 366 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:20:53,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 44 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:20:53,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2023-04-01 09:20:53,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 727. [2023-04-01 09:20:53,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 683 states have (on average 1.6617862371888725) internal successors, (1135), 707 states have internal predecessors, (1135), 10 states have call successors, (10), 10 states have call predecessors, (10), 33 states have return successors, (115), 9 states have call predecessors, (115), 9 states have call successors, (115) [2023-04-01 09:20:53,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1260 transitions. [2023-04-01 09:20:53,154 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1260 transitions. Word has length 101 [2023-04-01 09:20:53,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:20:53,154 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 1260 transitions. [2023-04-01 09:20:53,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 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 09:20:53,155 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1260 transitions. [2023-04-01 09:20:53,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-04-01 09:20:53,158 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:20:53,159 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 09:20:53,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 09:20:53,159 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:20:53,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:20:53,159 INFO L85 PathProgramCache]: Analyzing trace with hash -394828449, now seen corresponding path program 1 times [2023-04-01 09:20:53,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:20:53,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837122574] [2023-04-01 09:20:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:20:53,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:20:53,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:20:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 09:20:53,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:20:53,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837122574] [2023-04-01 09:20:53,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837122574] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:20:53,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226695443] [2023-04-01 09:20:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:20:53,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:20:53,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:20:53,355 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 09:20:53,383 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 09:20:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:20:53,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:20:53,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:20:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 09:20:53,568 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:20:53,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226695443] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:20:53,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:20:53,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 09:20:53,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146499648] [2023-04-01 09:20:53,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:20:53,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:20:53,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:20:53,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:20:53,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:20:53,570 INFO L87 Difference]: Start difference. First operand 727 states and 1260 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:20:53,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:20:53,955 INFO L93 Difference]: Finished difference Result 2119 states and 3892 transitions. [2023-04-01 09:20:53,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 09:20:53,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 112 [2023-04-01 09:20:53,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:20:53,963 INFO L225 Difference]: With dead ends: 2119 [2023-04-01 09:20:53,963 INFO L226 Difference]: Without dead ends: 1397 [2023-04-01 09:20:53,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 09:20:53,966 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 259 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:20:53,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 39 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:20:53,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2023-04-01 09:20:54,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1265. [2023-04-01 09:20:54,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1192 states have (on average 1.4421140939597314) internal successors, (1719), 1233 states have internal predecessors, (1719), 16 states have call successors, (16), 16 states have call predecessors, (16), 56 states have return successors, (229), 15 states have call predecessors, (229), 15 states have call successors, (229) [2023-04-01 09:20:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 1964 transitions. [2023-04-01 09:20:54,020 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 1964 transitions. Word has length 112 [2023-04-01 09:20:54,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:20:54,021 INFO L495 AbstractCegarLoop]: Abstraction has 1265 states and 1964 transitions. [2023-04-01 09:20:54,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:20:54,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 1964 transitions. [2023-04-01 09:20:54,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-01 09:20:54,025 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:20:54,025 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 09:20:54,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 09:20:54,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:20:54,232 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:20:54,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:20:54,233 INFO L85 PathProgramCache]: Analyzing trace with hash -705877305, now seen corresponding path program 1 times [2023-04-01 09:20:54,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:20:54,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712297584] [2023-04-01 09:20:54,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:20:54,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:20:54,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:20:54,368 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 09:20:54,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:20:54,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712297584] [2023-04-01 09:20:54,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712297584] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:20:54,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124541076] [2023-04-01 09:20:54,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:20:54,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:20:54,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:20:54,370 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 09:20:54,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 09:20:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:20:54,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:20:54,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:20:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:20:54,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:20:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:20:54,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124541076] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:20:54,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1815835014] [2023-04-01 09:20:54,716 INFO L159 IcfgInterpreter]: Started Sifa with 90 locations of interest [2023-04-01 09:20:54,716 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:20:54,720 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:20:54,724 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:20:54,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:20:55,137 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 98 for LOIs