/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/Problem14_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:12:23,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:12:23,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:12:23,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:12:23,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:12:23,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:12:23,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:12:23,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:12:23,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:12:23,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:12:23,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:12:23,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:12:23,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:12:23,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:12:23,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:12:23,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:12:23,447 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:12:23,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:12:23,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:12:23,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:12:23,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:12:23,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:12:23,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:12:23,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:12:23,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:12:23,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:12:23,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:12:23,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:12:23,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:12:23,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:12:23,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:12:23,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:12:23,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:12:23,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:12:23,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:12:23,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:12:23,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:12:23,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:12:23,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:12:23,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:12:23,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:12:23,483 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 10:12:23,518 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:12:23,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:12:23,519 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:12:23,519 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:12:23,520 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:12:23,520 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:12:23,520 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:12:23,520 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:12:23,520 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:12:23,520 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:12:23,521 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:12:23,521 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:12:23,521 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:12:23,522 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:12:23,522 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:12:23,522 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:12:23,522 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:12:23,522 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:12:23,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:12:23,523 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:12:23,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:12:23,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:12:23,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:12:23,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:12:23,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:12:23,524 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:12:23,524 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:12:23,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:12:23,524 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:12:23,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:12:23,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:12:23,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:12:23,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:12:23,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:12:23,525 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:12:23,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:12:23,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:12:23,526 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:12:23,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:12:23,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:12:23,526 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:12:23,526 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:12:23,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:12:23,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:12:23,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:12:23,750 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:12:23,751 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:12:23,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem14_label26.c [2023-04-01 10:12:24,959 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:12:25,256 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:12:25,256 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem14_label26.c [2023-04-01 10:12:25,281 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/969e28ff5/524455d6241549a990f24ae2784cd652/FLAG07abe49c0 [2023-04-01 10:12:25,295 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/969e28ff5/524455d6241549a990f24ae2784cd652 [2023-04-01 10:12:25,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:12:25,305 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:12:25,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:12:25,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:12:25,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:12:25,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:12:25" (1/1) ... [2023-04-01 10:12:25,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d7d8c31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:12:25, skipping insertion in model container [2023-04-01 10:12:25,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:12:25" (1/1) ... [2023-04-01 10:12:25,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:12:25,374 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:12:25,590 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/Problem14_label26.c[6725,6738] [2023-04-01 10:12:25,764 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:12:25,774 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:12:25,798 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/Problem14_label26.c[6725,6738] [2023-04-01 10:12:25,884 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:12:25,898 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:12:25,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:12:25 WrapperNode [2023-04-01 10:12:25,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:12:25,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:12:25,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:12:25,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:12:25,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:12:25" (1/1) ... [2023-04-01 10:12:25,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:12:25" (1/1) ... [2023-04-01 10:12:25,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:12:25" (1/1) ... [2023-04-01 10:12:25,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:12:25" (1/1) ... [2023-04-01 10:12:25,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:12:25" (1/1) ... [2023-04-01 10:12:25,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:12:25" (1/1) ... [2023-04-01 10:12:26,015 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:12:25" (1/1) ... [2023-04-01 10:12:26,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:12:25" (1/1) ... [2023-04-01 10:12:26,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:12:26,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:12:26,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:12:26,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:12:26,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:12:25" (1/1) ... [2023-04-01 10:12:26,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:12:26,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:12:26,069 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 10:12:26,084 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 10:12:26,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:12:26,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:12:26,106 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:12:26,106 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:12:26,106 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:12:26,106 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:12:26,107 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:12:26,107 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:12:26,107 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:12:26,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:12:26,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:12:26,107 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:12:26,107 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:12:26,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:12:26,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:12:26,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:12:26,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:12:26,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:12:26,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:12:26,185 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:12:26,187 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:12:27,391 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:12:31,749 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:12:31,750 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:12:31,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:12:31 BoogieIcfgContainer [2023-04-01 10:12:31,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:12:31,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:12:31,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:12:31,764 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:12:31,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:12:25" (1/3) ... [2023-04-01 10:12:31,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ded1e64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:12:31, skipping insertion in model container [2023-04-01 10:12:31,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:12:25" (2/3) ... [2023-04-01 10:12:31,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ded1e64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:12:31, skipping insertion in model container [2023-04-01 10:12:31,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:12:31" (3/3) ... [2023-04-01 10:12:31,767 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label26.c [2023-04-01 10:12:31,788 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:12:31,788 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:12:31,840 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:12:31,847 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;@1bbaf0e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:12:31,847 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:12:31,853 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 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 10:12:31,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:12:31,862 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:12:31,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:12:31,863 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:12:31,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:12:31,868 INFO L85 PathProgramCache]: Analyzing trace with hash 751702203, now seen corresponding path program 1 times [2023-04-01 10:12:31,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:12:31,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109193887] [2023-04-01 10:12:31,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:12:31,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:12:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:12:32,261 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 10:12:32,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:12:32,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109193887] [2023-04-01 10:12:32,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109193887] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:12:32,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:12:32,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:12:32,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838514263] [2023-04-01 10:12:32,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:12:32,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:12:32,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:12:32,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:12:32,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:12:32,319 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 10:12:32,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:12:32,445 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2023-04-01 10:12:32,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:12:32,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2023-04-01 10:12:32,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:12:32,453 INFO L225 Difference]: With dead ends: 43 [2023-04-01 10:12:32,454 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 10:12:32,456 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 10:12:32,459 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:12:32,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 26 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:12:32,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 10:12:32,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-04-01 10:12:32,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:12:32,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-04-01 10:12:32,567 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 11 [2023-04-01 10:12:32,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:12:32,567 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-04-01 10:12:32,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 10:12:32,568 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-04-01 10:12:32,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 10:12:32,569 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:12:32,569 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:12:32,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:12:32,570 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:12:32,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:12:32,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1408575675, now seen corresponding path program 1 times [2023-04-01 10:12:32,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:12:32,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812139800] [2023-04-01 10:12:32,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:12:32,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:12:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:12:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:12:55,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:12:55,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812139800] [2023-04-01 10:12:55,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812139800] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:12:55,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388140592] [2023-04-01 10:12:55,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:12:55,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:12:55,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:12:55,479 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 10:12:55,481 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 10:12:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:12:55,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-01 10:12:55,642 INFO L285 TraceCheckSpWp]: Computing forward predicates...