/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 OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem03_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 16:42:55,360 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 16:42:55,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 16:42:55,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 16:42:55,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 16:42:55,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 16:42:55,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 16:42:55,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 16:42:55,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 16:42:55,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 16:42:55,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 16:42:55,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 16:42:55,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 16:42:55,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 16:42:55,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 16:42:55,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 16:42:55,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 16:42:55,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 16:42:55,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 16:42:55,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 16:42:55,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 16:42:55,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 16:42:55,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 16:42:55,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 16:42:55,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 16:42:55,423 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 16:42:55,424 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 16:42:55,424 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 16:42:55,425 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 16:42:55,425 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 16:42:55,425 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 16:42:55,426 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 16:42:55,427 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 16:42:55,427 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 16:42:55,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 16:42:55,428 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 16:42:55,428 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 16:42:55,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 16:42:55,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 16:42:55,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 16:42:55,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 16:42:55,430 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 [2023-04-02 16:42:55,453 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 16:42:55,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 16:42:55,454 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 16:42:55,454 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 16:42:55,454 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 16:42:55,454 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 16:42:55,455 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 16:42:55,455 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 16:42:55,455 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 16:42:55,455 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 16:42:55,455 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 16:42:55,456 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 16:42:55,456 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 16:42:55,456 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 16:42:55,456 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 16:42:55,456 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 16:42:55,456 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 16:42:55,456 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 16:42:55,456 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 16:42:55,457 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 16:42:55,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 16:42:55,457 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 16:42:55,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 16:42:55,457 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 16:42:55,457 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 16:42:55,457 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 16:42:55,457 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 16:42:55,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 16:42:55,457 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 16:42:55,458 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 16:42:55,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 16:42:55,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 16:42:55,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 16:42:55,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 16:42:55,458 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 16:42:55,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 16:42:55,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 16:42:55,458 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 16:42:55,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 16:42:55,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 16:42:55,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 16:42:55,459 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 16:42:55,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 16:42:55,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 16:42:55,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 16:42:55,636 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 16:42:55,636 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 16:42:55,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label40.c [2023-04-02 16:42:56,617 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 16:42:56,858 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 16:42:56,858 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label40.c [2023-04-02 16:42:56,875 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83722392d/5093702d368c4f8d825eb33240b1dab8/FLAG58c2ac8cf [2023-04-02 16:42:56,890 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83722392d/5093702d368c4f8d825eb33240b1dab8 [2023-04-02 16:42:56,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 16:42:56,893 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 16:42:56,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 16:42:56,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 16:42:56,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 16:42:56,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:42:56" (1/1) ... [2023-04-02 16:42:56,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d088236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:56, skipping insertion in model container [2023-04-02 16:42:56,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:42:56" (1/1) ... [2023-04-02 16:42:56,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 16:42:56,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 16:42:57,326 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_label40.c[59070,59083] [2023-04-02 16:42:57,353 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 16:42:57,361 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 16:42:57,545 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_label40.c[59070,59083] [2023-04-02 16:42:57,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 16:42:57,564 INFO L208 MainTranslator]: Completed translation [2023-04-02 16:42:57,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:57 WrapperNode [2023-04-02 16:42:57,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 16:42:57,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 16:42:57,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 16:42:57,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 16:42:57,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:57" (1/1) ... [2023-04-02 16:42:57,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:57" (1/1) ... [2023-04-02 16:42:57,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:57" (1/1) ... [2023-04-02 16:42:57,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:57" (1/1) ... [2023-04-02 16:42:57,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:57" (1/1) ... [2023-04-02 16:42:57,645 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:57" (1/1) ... [2023-04-02 16:42:57,652 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:57" (1/1) ... [2023-04-02 16:42:57,661 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:57" (1/1) ... [2023-04-02 16:42:57,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 16:42:57,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 16:42:57,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 16:42:57,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 16:42:57,679 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:57" (1/1) ... [2023-04-02 16:42:57,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 16:42:57,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:42:57,718 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) [2023-04-02 16:42:57,739 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 [2023-04-02 16:42:57,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 16:42:57,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 16:42:57,764 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 16:42:57,765 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 16:42:57,765 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 16:42:57,765 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 16:42:57,765 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 16:42:57,765 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 16:42:57,765 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 16:42:57,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 16:42:57,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 16:42:57,765 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 16:42:57,765 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 16:42:57,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 16:42:57,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 16:42:57,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 16:42:57,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 16:42:57,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 16:42:57,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 16:42:57,836 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 16:42:57,838 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 16:42:59,063 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 16:42:59,283 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 16:42:59,283 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 16:42:59,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:42:59 BoogieIcfgContainer [2023-04-02 16:42:59,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 16:42:59,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 16:42:59,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 16:42:59,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 16:42:59,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 04:42:56" (1/3) ... [2023-04-02 16:42:59,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b1d0b1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:42:59, skipping insertion in model container [2023-04-02 16:42:59,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:42:57" (2/3) ... [2023-04-02 16:42:59,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b1d0b1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:42:59, skipping insertion in model container [2023-04-02 16:42:59,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:42:59" (3/3) ... [2023-04-02 16:42:59,291 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label40.c [2023-04-02 16:42:59,302 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 16:42:59,303 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 16:42:59,342 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 16:42:59,347 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;@600e619e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 16:42:59,347 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 16:42:59,352 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 16:42:59,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-02 16:42:59,365 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:42:59,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:42:59,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:42:59,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:42:59,371 INFO L85 PathProgramCache]: Analyzing trace with hash 729863575, now seen corresponding path program 1 times [2023-04-02 16:42:59,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:42:59,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605639740] [2023-04-02 16:42:59,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:42:59,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:42:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:43:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:43:00,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:43:00,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605639740] [2023-04-02 16:43:00,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605639740] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:43:00,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:43:00,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 16:43:00,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917560752] [2023-04-02 16:43:00,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:43:00,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 16:43:00,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:43:00,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 16:43:00,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 16:43:00,411 INFO L87 Difference]: Start difference. First operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 16:43:01,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:43:01,009 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-04-02 16:43:01,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 16:43:01,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2023-04-02 16:43:01,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:43:01,033 INFO L225 Difference]: With dead ends: 462 [2023-04-02 16:43:01,034 INFO L226 Difference]: Without dead ends: 301 [2023-04-02 16:43:01,038 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 [2023-04-02 16:43:01,043 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 16 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 16:43:01,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 16:43:01,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-02 16:43:01,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-04-02 16:43:01,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.9112627986348123) internal successors, (560), 293 states have internal predecessors, (560), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 16:43:01,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 569 transitions. [2023-04-02 16:43:01,085 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 569 transitions. Word has length 149 [2023-04-02 16:43:01,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:43:01,086 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 569 transitions. [2023-04-02 16:43:01,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 16:43:01,086 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 569 transitions. [2023-04-02 16:43:01,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-02 16:43:01,088 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:43:01,089 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:43:01,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 16:43:01,089 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:43:01,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:43:01,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2106100369, now seen corresponding path program 1 times [2023-04-02 16:43:01,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:43:01,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780005028] [2023-04-02 16:43:01,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:43:01,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:43:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:43:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:43:01,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:43:01,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780005028] [2023-04-02 16:43:01,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780005028] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:43:01,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:43:01,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:43:01,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476105861] [2023-04-02 16:43:01,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:43:01,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:43:01,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:43:01,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:43:01,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:43:01,490 INFO L87 Difference]: Start difference. First operand 301 states and 569 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:43:02,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:43:02,157 INFO L93 Difference]: Finished difference Result 921 states and 1755 transitions. [2023-04-02 16:43:02,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 16:43:02,158 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 157 [2023-04-02 16:43:02,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:43:02,161 INFO L225 Difference]: With dead ends: 921 [2023-04-02 16:43:02,161 INFO L226 Difference]: Without dead ends: 625 [2023-04-02 16:43:02,163 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 [2023-04-02 16:43:02,164 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 536 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 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, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 16:43:02,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 44 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 16:43:02,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2023-04-02 16:43:02,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 603. [2023-04-02 16:43:02,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 587 states have (on average 1.7393526405451447) internal successors, (1021), 591 states have internal predecessors, (1021), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-04-02 16:43:02,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1048 transitions. [2023-04-02 16:43:02,193 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1048 transitions. Word has length 157 [2023-04-02 16:43:02,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:43:02,193 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 1048 transitions. [2023-04-02 16:43:02,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 4 states have internal predecessors, (151), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:43:02,193 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1048 transitions. [2023-04-02 16:43:02,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-02 16:43:02,196 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:43:02,197 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2023-04-02 16:43:02,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 16:43:02,197 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:43:02,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:43:02,197 INFO L85 PathProgramCache]: Analyzing trace with hash 804735890, now seen corresponding path program 1 times [2023-04-02 16:43:02,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:43:02,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867236563] [2023-04-02 16:43:02,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:43:02,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:43:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:43:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:43:02,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:43:02,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867236563] [2023-04-02 16:43:02,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867236563] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:43:02,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:43:02,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:43:02,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569212283] [2023-04-02 16:43:02,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:43:02,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:43:02,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:43:02,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:43:02,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:43:02,929 INFO L87 Difference]: Start difference. First operand 603 states and 1048 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 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) [2023-04-02 16:43:03,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:43:03,709 INFO L93 Difference]: Finished difference Result 1849 states and 3319 transitions. [2023-04-02 16:43:03,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 16:43:03,710 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 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 163 [2023-04-02 16:43:03,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:43:03,716 INFO L225 Difference]: With dead ends: 1849 [2023-04-02 16:43:03,716 INFO L226 Difference]: Without dead ends: 1251 [2023-04-02 16:43:03,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 16:43:03,718 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 454 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 16:43:03,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 55 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 16:43:03,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2023-04-02 16:43:03,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1223. [2023-04-02 16:43:03,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1223 states, 1183 states have (on average 1.6593406593406594) internal successors, (1963), 1203 states have internal predecessors, (1963), 10 states have call successors, (10), 10 states have call predecessors, (10), 29 states have return successors, (93), 9 states have call predecessors, (93), 9 states have call successors, (93) [2023-04-02 16:43:03,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 2066 transitions. [2023-04-02 16:43:03,757 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 2066 transitions. Word has length 163 [2023-04-02 16:43:03,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:43:03,757 INFO L495 AbstractCegarLoop]: Abstraction has 1223 states and 2066 transitions. [2023-04-02 16:43:03,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 4 states have internal predecessors, (157), 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) [2023-04-02 16:43:03,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 2066 transitions. [2023-04-02 16:43:03,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-04-02 16:43:03,762 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:43:03,762 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] [2023-04-02 16:43:03,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 16:43:03,763 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:43:03,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:43:03,763 INFO L85 PathProgramCache]: Analyzing trace with hash 136635297, now seen corresponding path program 1 times [2023-04-02 16:43:03,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:43:03,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243700856] [2023-04-02 16:43:03,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:43:03,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:43:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:43:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:43:04,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:43:04,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243700856] [2023-04-02 16:43:04,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243700856] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:43:04,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:43:04,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:43:04,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90755939] [2023-04-02 16:43:04,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:43:04,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:43:04,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:43:04,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:43:04,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:43:04,032 INFO L87 Difference]: Start difference. First operand 1223 states and 2066 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) [2023-04-02 16:43:04,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:43:04,703 INFO L93 Difference]: Finished difference Result 3612 states and 6396 transitions. [2023-04-02 16:43:04,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 16:43:04,703 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 [2023-04-02 16:43:04,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:43:04,713 INFO L225 Difference]: With dead ends: 3612 [2023-04-02 16:43:04,713 INFO L226 Difference]: Without dead ends: 2394 [2023-04-02 16:43:04,716 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 [2023-04-02 16:43:04,717 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 526 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 16:43:04,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 43 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 16:43:04,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2394 states. [2023-04-02 16:43:04,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2394 to 2344. [2023-04-02 16:43:04,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2244 states have (on average 1.5650623885918002) internal successors, (3512), 2310 states have internal predecessors, (3512), 17 states have call successors, (17), 17 states have call predecessors, (17), 82 states have return successors, (307), 16 states have call predecessors, (307), 16 states have call successors, (307) [2023-04-02 16:43:04,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 3836 transitions. [2023-04-02 16:43:04,796 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 3836 transitions. Word has length 171 [2023-04-02 16:43:04,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:43:04,796 INFO L495 AbstractCegarLoop]: Abstraction has 2344 states and 3836 transitions. [2023-04-02 16:43:04,796 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) [2023-04-02 16:43:04,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 3836 transitions. [2023-04-02 16:43:04,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-04-02 16:43:04,801 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:43:04,801 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2023-04-02 16:43:04,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 16:43:04,801 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:43:04,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:43:04,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1111495706, now seen corresponding path program 1 times [2023-04-02 16:43:04,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:43:04,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378902652] [2023-04-02 16:43:04,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:43:04,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:43:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:43:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:43:04,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:43:04,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378902652] [2023-04-02 16:43:04,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378902652] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 16:43:04,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544494780] [2023-04-02 16:43:04,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:43:04,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 16:43:04,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:43:04,987 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) [2023-04-02 16:43:04,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 16:43:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:43:05,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 16:43:05,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 16:43:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:43:05,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 16:43:05,460 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:43:05,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544494780] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 16:43:05,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2141150831] [2023-04-02 16:43:05,495 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-04-02 16:43:05,495 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 16:43:05,498 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 16:43:05,501 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 16:43:05,501 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 16:43:06,159 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 162 for LOIs [2023-04-02 16:43:14,712 WARN L223 SmtUtils]: Spent 7.57s on a formula simplification that was a NOOP. DAG size: 962 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-02 16:43:37,362 WARN L223 SmtUtils]: Spent 6.77s on a formula simplification that was a NOOP. DAG size: 962 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-02 16:44:20,541 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 24864 conjuctions. This might take some time... [2023-04-02 16:45:11,754 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 24864 conjuctions.