/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/Problem01_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:10:25,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:10:25,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:10:25,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:10:25,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:10:25,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:10:25,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:10:25,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:10:25,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:10:25,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:10:25,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:10:25,391 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:10:25,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:10:25,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:10:25,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:10:25,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:10:25,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:10:25,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:10:25,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:10:25,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:10:25,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:10:25,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:10:25,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:10:25,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:10:25,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:10:25,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:10:25,412 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:10:25,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:10:25,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:10:25,414 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:10:25,414 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:10:25,415 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:10:25,415 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:10:25,416 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:10:25,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:10:25,417 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:10:25,417 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:10:25,418 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:10:25,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:10:25,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:10:25,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:10:25,421 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 03:10:25,442 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:10:25,442 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:10:25,442 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:10:25,443 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:10:25,443 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:10:25,443 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:10:25,443 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:10:25,444 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:10:25,444 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:10:25,444 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:10:25,444 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:10:25,444 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:10:25,444 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:10:25,444 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:10:25,444 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:10:25,445 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:10:25,445 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:10:25,445 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:10:25,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:10:25,445 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:10:25,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:10:25,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:10:25,446 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:10:25,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:10:25,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:10:25,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:10:25,446 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:10:25,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:10:25,446 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:10:25,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:10:25,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:10:25,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:10:25,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:10:25,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:10:25,447 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:10:25,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:10:25,448 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:10:25,448 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:10:25,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:10:25,448 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:10:25,448 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:10:25,448 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:10:25,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:10:25,713 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:10:25,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:10:25,717 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:10:25,718 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:10:25,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem01_label06.c [2023-04-01 03:10:26,943 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:10:27,212 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:10:27,213 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem01_label06.c [2023-04-01 03:10:27,223 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ae996413/93b03e1c1831453eade7315a9229a7af/FLAGa0addeba5 [2023-04-01 03:10:27,520 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ae996413/93b03e1c1831453eade7315a9229a7af [2023-04-01 03:10:27,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:10:27,525 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:10:27,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:10:27,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:10:27,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:10:27,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:10:27" (1/1) ... [2023-04-01 03:10:27,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57f37a75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:27, skipping insertion in model container [2023-04-01 03:10:27,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:10:27" (1/1) ... [2023-04-01 03:10:27,539 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:10:27,580 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:10:27,860 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_label06.c[20964,20977] [2023-04-01 03:10:27,898 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:10:27,909 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:10:28,012 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_label06.c[20964,20977] [2023-04-01 03:10:28,019 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:10:28,042 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:10:28,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:28 WrapperNode [2023-04-01 03:10:28,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:10:28,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:10:28,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:10:28,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:10:28,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:28" (1/1) ... [2023-04-01 03:10:28,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:28" (1/1) ... [2023-04-01 03:10:28,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:28" (1/1) ... [2023-04-01 03:10:28,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:28" (1/1) ... [2023-04-01 03:10:28,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:28" (1/1) ... [2023-04-01 03:10:28,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:28" (1/1) ... [2023-04-01 03:10:28,177 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:28" (1/1) ... [2023-04-01 03:10:28,182 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:28" (1/1) ... [2023-04-01 03:10:28,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:10:28,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:10:28,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:10:28,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:10:28,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:28" (1/1) ... [2023-04-01 03:10:28,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:10:28,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:10:28,218 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 03:10:28,234 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 03:10:28,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:10:28,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:10:28,258 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:10:28,259 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:10:28,260 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:10:28,260 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:10:28,260 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:10:28,260 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:10:28,260 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:10:28,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:10:28,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:10:28,260 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:10:28,260 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:10:28,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:10:28,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:10:28,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:10:28,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:10:28,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:10:28,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:10:28,350 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:10:28,353 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:10:29,331 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:10:29,545 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:10:29,546 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:10:29,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:10:29 BoogieIcfgContainer [2023-04-01 03:10:29,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:10:29,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:10:29,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:10:29,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:10:29,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:10:27" (1/3) ... [2023-04-01 03:10:29,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2610ae9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:10:29, skipping insertion in model container [2023-04-01 03:10:29,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:10:28" (2/3) ... [2023-04-01 03:10:29,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2610ae9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:10:29, skipping insertion in model container [2023-04-01 03:10:29,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:10:29" (3/3) ... [2023-04-01 03:10:29,559 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem01_label06.c [2023-04-01 03:10:29,576 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:10:29,576 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:10:29,631 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:10:29,637 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;@291967ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:10:29,638 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:10:29,644 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 03:10:29,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 03:10:29,655 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:10:29,655 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 03:10:29,656 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:10:29,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:10:29,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1124020611, now seen corresponding path program 1 times [2023-04-01 03:10:29,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:10:29,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39717844] [2023-04-01 03:10:29,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:10:29,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:10:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:10:30,436 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 03:10:30,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:10:30,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39717844] [2023-04-01 03:10:30,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39717844] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:10:30,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:10:30,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:10:30,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476120955] [2023-04-01 03:10:30,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:10:30,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:10:30,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:10:30,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:10:30,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:10:30,493 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 03:10:30,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:10:30,855 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2023-04-01 03:10:30,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:10:30,858 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 03:10:30,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:10:30,867 INFO L225 Difference]: With dead ends: 246 [2023-04-01 03:10:30,867 INFO L226 Difference]: Without dead ends: 157 [2023-04-01 03:10:30,870 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 03:10:30,873 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 32 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:10:30,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 48 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:10:30,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-04-01 03:10:30,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-04-01 03:10:30,935 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 03:10:30,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 273 transitions. [2023-04-01 03:10:30,946 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 273 transitions. Word has length 77 [2023-04-01 03:10:30,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:10:30,948 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 273 transitions. [2023-04-01 03:10:30,948 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 03:10:30,949 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 273 transitions. [2023-04-01 03:10:30,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 03:10:30,954 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:10:30,955 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 03:10:30,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:10:30,956 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:10:30,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:10:30,957 INFO L85 PathProgramCache]: Analyzing trace with hash 301935773, now seen corresponding path program 1 times [2023-04-01 03:10:30,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:10:30,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969344557] [2023-04-01 03:10:30,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:10:30,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:10:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:10:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:10:31,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:10:31,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969344557] [2023-04-01 03:10:31,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969344557] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:10:31,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:10:31,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:10:31,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646318642] [2023-04-01 03:10:31,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:10:31,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:10:31,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:10:31,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:10:31,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:10:31,256 INFO L87 Difference]: Start difference. First operand 157 states and 273 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 03:10:31,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:10:31,757 INFO L93 Difference]: Finished difference Result 481 states and 860 transitions. [2023-04-01 03:10:31,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:10:31,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 87 [2023-04-01 03:10:31,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:10:31,762 INFO L225 Difference]: With dead ends: 481 [2023-04-01 03:10:31,763 INFO L226 Difference]: Without dead ends: 329 [2023-04-01 03:10:31,764 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 03:10:31,765 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 269 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:10:31,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 39 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:10:31,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-04-01 03:10:31,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 313. [2023-04-01 03:10:31,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 298 states have (on average 1.7315436241610738) internal successors, (516), 301 states have internal predecessors, (516), 6 states have call successors, (6), 6 states have call predecessors, (6), 8 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2023-04-01 03:10:31,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 541 transitions. [2023-04-01 03:10:31,794 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 541 transitions. Word has length 87 [2023-04-01 03:10:31,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:10:31,794 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 541 transitions. [2023-04-01 03:10:31,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 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 03:10:31,795 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 541 transitions. [2023-04-01 03:10:31,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 03:10:31,797 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:10:31,797 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 03:10:31,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:10:31,798 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:10:31,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:10:31,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1131798673, now seen corresponding path program 1 times [2023-04-01 03:10:31,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:10:31,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601135432] [2023-04-01 03:10:31,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:10:31,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:10:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:10:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:10:32,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:10:32,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601135432] [2023-04-01 03:10:32,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601135432] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:10:32,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236280006] [2023-04-01 03:10:32,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:10:32,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:10:32,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:10:32,688 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 03:10:32,693 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 03:10:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:10:32,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:10:32,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:10:33,042 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:10:33,043 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:10:33,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236280006] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:10:33,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:10:33,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 03:10:33,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349309957] [2023-04-01 03:10:33,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:10:33,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:10:33,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:10:33,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:10:33,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 03:10:33,049 INFO L87 Difference]: Start difference. First operand 313 states and 541 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:10:33,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:10:33,408 INFO L93 Difference]: Finished difference Result 771 states and 1353 transitions. [2023-04-01 03:10:33,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:10:33,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 88 [2023-04-01 03:10:33,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:10:33,428 INFO L225 Difference]: With dead ends: 771 [2023-04-01 03:10:33,428 INFO L226 Difference]: Without dead ends: 463 [2023-04-01 03:10:33,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 03:10:33,434 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:10:33,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 155 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 03:10:33,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-04-01 03:10:33,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 463. [2023-04-01 03:10:33,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 444 states have (on average 1.6261261261261262) internal successors, (722), 447 states have internal predecessors, (722), 8 states have call successors, (8), 8 states have call predecessors, (8), 10 states have return successors, (37), 7 states have call predecessors, (37), 7 states have call successors, (37) [2023-04-01 03:10:33,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 767 transitions. [2023-04-01 03:10:33,486 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 767 transitions. Word has length 88 [2023-04-01 03:10:33,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:10:33,489 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 767 transitions. [2023-04-01 03:10:33,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 03:10:33,489 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 767 transitions. [2023-04-01 03:10:33,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 03:10:33,503 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:10:33,503 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:10:33,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 03:10:33,713 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 03:10:33,713 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:10:33,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:10:33,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1842807415, now seen corresponding path program 1 times [2023-04-01 03:10:33,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:10:33,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292994356] [2023-04-01 03:10:33,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:10:33,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:10:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:10:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:10:34,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:10:34,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292994356] [2023-04-01 03:10:34,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292994356] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:10:34,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:10:34,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:10:34,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224274829] [2023-04-01 03:10:34,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:10:34,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:10:34,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:10:34,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:10:34,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:10:34,136 INFO L87 Difference]: Start difference. First operand 463 states and 767 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 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 03:10:34,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:10:34,578 INFO L93 Difference]: Finished difference Result 1435 states and 2461 transitions. [2023-04-01 03:10:34,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:10:34,579 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 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 92 [2023-04-01 03:10:34,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:10:34,584 INFO L225 Difference]: With dead ends: 1435 [2023-04-01 03:10:34,585 INFO L226 Difference]: Without dead ends: 977 [2023-04-01 03:10:34,586 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 03:10:34,587 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 245 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:10:34,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 44 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 03:10:34,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2023-04-01 03:10:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 961. [2023-04-01 03:10:34,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 906 states have (on average 1.4150110375275937) internal successors, (1282), 933 states have internal predecessors, (1282), 14 states have call successors, (14), 14 states have call predecessors, (14), 40 states have return successors, (138), 13 states have call predecessors, (138), 13 states have call successors, (138) [2023-04-01 03:10:34,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1434 transitions. [2023-04-01 03:10:34,622 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1434 transitions. Word has length 92 [2023-04-01 03:10:34,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:10:34,622 INFO L495 AbstractCegarLoop]: Abstraction has 961 states and 1434 transitions. [2023-04-01 03:10:34,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 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 03:10:34,622 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1434 transitions. [2023-04-01 03:10:34,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-01 03:10:34,625 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:10:34,626 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 03:10:34,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 03:10:34,626 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:10:34,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:10:34,626 INFO L85 PathProgramCache]: Analyzing trace with hash 885097651, now seen corresponding path program 1 times [2023-04-01 03:10:34,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:10:34,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055530229] [2023-04-01 03:10:34,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:10:34,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:10:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:10:34,814 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 03:10:34,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:10:34,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055530229] [2023-04-01 03:10:34,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055530229] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:10:34,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744633636] [2023-04-01 03:10:34,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:10:34,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:10:34,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:10:34,817 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 03:10:34,822 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 03:10:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:10:34,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:10:34,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:10:35,039 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 03:10:35,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:10:35,192 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 03:10:35,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744633636] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:10:35,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [502889325] [2023-04-01 03:10:35,223 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2023-04-01 03:10:35,223 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:10:35,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:10:35,232 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:10:35,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:10:35,631 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 72 for LOIs [2023-04-01 03:11:00,425 WARN L223 SmtUtils]: Spent 20.64s on a formula simplification that was a NOOP. DAG size: 1347 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)