/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/Problem01_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:14:27,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:14:27,356 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:14:27,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:14:27,387 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:14:27,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:14:27,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:14:27,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:14:27,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:14:27,400 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:14:27,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:14:27,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:14:27,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:14:27,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:14:27,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:14:27,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:14:27,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:14:27,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:14:27,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:14:27,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:14:27,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:14:27,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:14:27,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:14:27,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:14:27,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:14:27,421 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:14:27,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:14:27,422 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:14:27,423 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:14:27,423 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:14:27,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:14:27,424 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:14:27,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:14:27,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:14:27,426 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:14:27,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:14:27,426 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:14:27,427 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:14:27,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:14:27,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:14:27,428 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:14:27,429 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 09:14:27,449 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:14:27,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:14:27,450 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:14:27,450 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:14:27,451 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:14:27,451 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:14:27,451 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:14:27,451 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:14:27,451 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:14:27,452 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:14:27,452 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:14:27,452 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:14:27,452 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:14:27,453 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:14:27,453 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:14:27,453 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:14:27,453 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:14:27,453 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:14:27,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:14:27,454 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:14:27,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:14:27,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:14:27,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:14:27,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:14:27,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:14:27,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:14:27,455 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:14:27,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:14:27,455 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:14:27,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:14:27,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:14:27,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:14:27,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:14:27,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:14:27,456 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:14:27,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:14:27,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:14:27,456 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:14:27,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:14:27,456 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:14:27,456 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:14:27,457 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:14:27,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:14:27,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:14:27,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:14:27,666 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:14:27,666 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:14:27,667 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem01_label21.c [2023-04-01 09:14:28,937 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:14:29,199 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:14:29,200 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label21.c [2023-04-01 09:14:29,214 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70111a908/373df2845b1a48b19073df8ade3f373c/FLAGbdaf11ef1 [2023-04-01 09:14:29,230 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70111a908/373df2845b1a48b19073df8ade3f373c [2023-04-01 09:14:29,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:14:29,234 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:14:29,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:14:29,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:14:29,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:14:29,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:14:29" (1/1) ... [2023-04-01 09:14:29,243 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70f36ab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:29, skipping insertion in model container [2023-04-01 09:14:29,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:14:29" (1/1) ... [2023-04-01 09:14:29,249 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:14:29,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:14:29,563 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/Problem01_label21.c[15876,15889] [2023-04-01 09:14:29,595 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:14:29,603 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:14:29,671 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/Problem01_label21.c[15876,15889] [2023-04-01 09:14:29,692 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:14:29,710 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:14:29,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:29 WrapperNode [2023-04-01 09:14:29,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:14:29,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:14:29,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:14:29,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:14:29,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:29" (1/1) ... [2023-04-01 09:14:29,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:29" (1/1) ... [2023-04-01 09:14:29,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:29" (1/1) ... [2023-04-01 09:14:29,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:29" (1/1) ... [2023-04-01 09:14:29,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:29" (1/1) ... [2023-04-01 09:14:29,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:29" (1/1) ... [2023-04-01 09:14:29,802 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:29" (1/1) ... [2023-04-01 09:14:29,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:29" (1/1) ... [2023-04-01 09:14:29,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:14:29,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:14:29,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:14:29,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:14:29,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:29" (1/1) ... [2023-04-01 09:14:29,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:14:29,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:14:29,849 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 09:14:29,870 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 09:14:29,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:14:29,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:14:29,891 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:14:29,892 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:14:29,892 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:14:29,892 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:14:29,892 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:14:29,892 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:14:29,893 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:14:29,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:14:29,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:14:29,893 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:14:29,893 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:14:29,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:14:29,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:14:29,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:14:29,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:14:29,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:14:29,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:14:29,959 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:14:29,960 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:14:30,845 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:14:31,034 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:14:31,036 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:14:31,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:14:31 BoogieIcfgContainer [2023-04-01 09:14:31,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:14:31,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:14:31,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:14:31,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:14:31,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:14:29" (1/3) ... [2023-04-01 09:14:31,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4202f954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:14:31, skipping insertion in model container [2023-04-01 09:14:31,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:14:29" (2/3) ... [2023-04-01 09:14:31,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4202f954 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:14:31, skipping insertion in model container [2023-04-01 09:14:31,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:14:31" (3/3) ... [2023-04-01 09:14:31,046 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label21.c [2023-04-01 09:14:31,060 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:14:31,060 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:14:31,111 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:14:31,116 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;@ae519bd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:14:31,116 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:14:31,119 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 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 09:14:31,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 09:14:31,127 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:14:31,128 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] [2023-04-01 09:14:31,128 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:14:31,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:14:31,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2062147748, now seen corresponding path program 1 times [2023-04-01 09:14:31,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:14:31,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49545906] [2023-04-01 09:14:31,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:14:31,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:14:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:14:31,668 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 09:14:31,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:14:31,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49545906] [2023-04-01 09:14:31,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49545906] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:14:31,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:14:31,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:14:31,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483972610] [2023-04-01 09:14:31,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:14:31,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:14:31,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:14:31,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:14:31,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:14:31,718 INFO L87 Difference]: Start difference. First operand has 86 states, 78 states have (on average 1.8974358974358974) internal successors, (148), 79 states have internal predecessors, (148), 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 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 09:14:32,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:14:32,187 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2023-04-01 09:14:32,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:14:32,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 77 [2023-04-01 09:14:32,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:14:32,202 INFO L225 Difference]: With dead ends: 246 [2023-04-01 09:14:32,202 INFO L226 Difference]: Without dead ends: 157 [2023-04-01 09:14:32,205 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 09:14:32,208 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 26 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:14:32,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 48 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:14:32,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-04-01 09:14:32,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-04-01 09:14:32,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 149 states have (on average 1.7718120805369129) internal successors, (264), 149 states have internal predecessors, (264), 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 09:14:32,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 273 transitions. [2023-04-01 09:14:32,259 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 273 transitions. Word has length 77 [2023-04-01 09:14:32,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:14:32,260 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 273 transitions. [2023-04-01 09:14:32,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 09:14:32,261 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 273 transitions. [2023-04-01 09:14:32,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-04-01 09:14:32,264 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:14:32,264 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 09:14:32,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:14:32,265 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:14:32,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:14:32,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1425737744, now seen corresponding path program 1 times [2023-04-01 09:14:32,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:14:32,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508940783] [2023-04-01 09:14:32,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:14:32,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:14:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:14:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:14:32,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:14:32,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508940783] [2023-04-01 09:14:32,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508940783] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:14:32,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:14:32,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:14:32,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684809762] [2023-04-01 09:14:32,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:14:32,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:14:32,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:14:32,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:14:32,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:14:32,493 INFO L87 Difference]: Start difference. First operand 157 states and 273 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 09:14:32,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:14:32,886 INFO L93 Difference]: Finished difference Result 483 states and 860 transitions. [2023-04-01 09:14:32,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:14:32,887 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 86 [2023-04-01 09:14:32,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:14:32,890 INFO L225 Difference]: With dead ends: 483 [2023-04-01 09:14:32,890 INFO L226 Difference]: Without dead ends: 331 [2023-04-01 09:14:32,891 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 09:14:32,892 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 294 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:14:32,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 43 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:14:32,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-04-01 09:14:32,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 315. [2023-04-01 09:14:32,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 299 states have (on average 1.645484949832776) internal successors, (492), 303 states have internal predecessors, (492), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2023-04-01 09:14:32,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 519 transitions. [2023-04-01 09:14:32,932 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 519 transitions. Word has length 86 [2023-04-01 09:14:32,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:14:32,932 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 519 transitions. [2023-04-01 09:14:32,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 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 09:14:32,932 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 519 transitions. [2023-04-01 09:14:32,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-01 09:14:32,938 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:14:32,939 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2023-04-01 09:14:32,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:14:32,939 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:14:32,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:14:32,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1320349294, now seen corresponding path program 1 times [2023-04-01 09:14:32,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:14:32,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975819881] [2023-04-01 09:14:32,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:14:32,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:14:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:14:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 09:14:33,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:14:33,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975819881] [2023-04-01 09:14:33,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975819881] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:14:33,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723461435] [2023-04-01 09:14:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:14:33,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:14:33,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:14:33,217 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 09:14:33,247 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 09:14:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:14:33,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 09:14:33,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:14:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 09:14:33,448 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:14:33,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723461435] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:14:33,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:14:33,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 09:14:33,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949275714] [2023-04-01 09:14:33,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:14:33,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:14:33,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:14:33,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:14:33,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:14:33,455 INFO L87 Difference]: Start difference. First operand 315 states and 519 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 09:14:33,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:14:33,885 INFO L93 Difference]: Finished difference Result 969 states and 1680 transitions. [2023-04-01 09:14:33,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 09:14:33,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 100 [2023-04-01 09:14:33,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:14:33,894 INFO L225 Difference]: With dead ends: 969 [2023-04-01 09:14:33,894 INFO L226 Difference]: Without dead ends: 659 [2023-04-01 09:14:33,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 09:14:33,898 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 267 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:14:33,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 35 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 09:14:33,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2023-04-01 09:14:33,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 637. [2023-04-01 09:14:33,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 602 states have (on average 1.601328903654485) internal successors, (964), 617 states have internal predecessors, (964), 10 states have call successors, (10), 10 states have call predecessors, (10), 24 states have return successors, (77), 9 states have call predecessors, (77), 9 states have call successors, (77) [2023-04-01 09:14:33,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1051 transitions. [2023-04-01 09:14:33,946 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1051 transitions. Word has length 100 [2023-04-01 09:14:33,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:14:33,946 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 1051 transitions. [2023-04-01 09:14:33,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 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 09:14:33,947 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1051 transitions. [2023-04-01 09:14:33,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-01 09:14:33,949 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:14:33,949 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 09:14:33,965 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 09:14:34,161 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 09:14:34,161 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:14:34,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:14:34,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1574043060, now seen corresponding path program 1 times [2023-04-01 09:14:34,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:14:34,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186146734] [2023-04-01 09:14:34,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:14:34,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:14:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:14:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:14:34,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:14:34,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186146734] [2023-04-01 09:14:34,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186146734] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:14:34,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192988809] [2023-04-01 09:14:34,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:14:34,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:14:34,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:14:34,329 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 09:14:34,332 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 09:14:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:14:34,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:14:34,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:14:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:14:34,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:14:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:14:34,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192988809] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:14:34,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [282207054] [2023-04-01 09:14:34,703 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-04-01 09:14:34,703 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:14:34,706 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:14:34,710 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:14:34,710 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:14:35,187 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 104 for LOIs [2023-04-01 09:15:02,052 WARN L223 SmtUtils]: Spent 20.10s on a formula simplification. DAG size of input: 1232 DAG size of output: 1230 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)