/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/recursive-simple/id2_b2_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 06:06:54,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 06:06:54,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 06:06:54,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 06:06:54,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 06:06:54,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 06:06:54,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 06:06:54,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 06:06:54,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 06:06:54,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 06:06:54,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 06:06:54,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 06:06:54,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 06:06:54,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 06:06:54,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 06:06:54,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 06:06:54,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 06:06:54,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 06:06:54,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 06:06:54,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 06:06:54,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 06:06:54,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 06:06:54,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 06:06:54,354 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 06:06:54,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 06:06:54,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 06:06:54,361 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 06:06:54,362 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 06:06:54,363 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 06:06:54,363 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 06:06:54,363 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 06:06:54,364 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 06:06:54,365 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 06:06:54,365 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 06:06:54,366 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 06:06:54,366 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 06:06:54,366 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 06:06:54,366 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 06:06:54,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 06:06:54,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 06:06:54,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 06:06:54,369 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 06:06:54,391 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 06:06:54,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 06:06:54,392 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 06:06:54,392 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 06:06:54,393 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 06:06:54,393 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 06:06:54,393 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 06:06:54,393 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 06:06:54,393 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 06:06:54,393 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 06:06:54,394 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 06:06:54,394 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 06:06:54,394 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 06:06:54,394 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 06:06:54,394 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 06:06:54,394 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 06:06:54,394 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 06:06:54,394 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 06:06:54,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 06:06:54,395 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 06:06:54,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 06:06:54,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 06:06:54,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 06:06:54,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 06:06:54,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 06:06:54,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 06:06:54,396 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 06:06:54,396 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 06:06:54,396 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 06:06:54,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 06:06:54,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 06:06:54,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 06:06:54,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:06:54,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 06:06:54,397 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 06:06:54,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 06:06:54,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 06:06:54,397 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 06:06:54,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 06:06:54,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 06:06:54,397 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 06:06:54,397 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 06:06:54,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 06:06:54,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 06:06:54,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 06:06:54,650 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 06:06:54,651 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 06:06:54,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id2_b2_o3.c [2023-04-01 06:06:55,822 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 06:06:55,967 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 06:06:55,967 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id2_b2_o3.c [2023-04-01 06:06:55,972 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdd585655/94a659e9932f4129b1bd029f756dbd8e/FLAGf48be0e95 [2023-04-01 06:06:55,983 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdd585655/94a659e9932f4129b1bd029f756dbd8e [2023-04-01 06:06:55,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 06:06:55,986 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 06:06:55,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 06:06:55,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 06:06:55,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 06:06:55,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:06:55" (1/1) ... [2023-04-01 06:06:55,994 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48f8a74a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:55, skipping insertion in model container [2023-04-01 06:06:55,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:06:55" (1/1) ... [2023-04-01 06:06:55,999 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 06:06:56,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 06:06:56,126 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/recursive-simple/id2_b2_o3.c[771,784] [2023-04-01 06:06:56,130 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:06:56,137 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 06:06:56,150 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/recursive-simple/id2_b2_o3.c[771,784] [2023-04-01 06:06:56,150 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 06:06:56,161 INFO L208 MainTranslator]: Completed translation [2023-04-01 06:06:56,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:56 WrapperNode [2023-04-01 06:06:56,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 06:06:56,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 06:06:56,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 06:06:56,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 06:06:56,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:56" (1/1) ... [2023-04-01 06:06:56,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:56" (1/1) ... [2023-04-01 06:06:56,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:56" (1/1) ... [2023-04-01 06:06:56,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:56" (1/1) ... [2023-04-01 06:06:56,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:56" (1/1) ... [2023-04-01 06:06:56,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:56" (1/1) ... [2023-04-01 06:06:56,189 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:56" (1/1) ... [2023-04-01 06:06:56,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:56" (1/1) ... [2023-04-01 06:06:56,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 06:06:56,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 06:06:56,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 06:06:56,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 06:06:56,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:56" (1/1) ... [2023-04-01 06:06:56,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 06:06:56,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:06:56,249 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 06:06:56,267 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 06:06:56,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 06:06:56,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 06:06:56,280 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 06:06:56,280 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2023-04-01 06:06:56,280 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2023-04-01 06:06:56,280 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 06:06:56,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 06:06:56,280 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 06:06:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 06:06:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 06:06:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 06:06:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure id [2023-04-01 06:06:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2023-04-01 06:06:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 06:06:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 06:06:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 06:06:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 06:06:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 06:06:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 06:06:56,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 06:06:56,328 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 06:06:56,330 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 06:06:56,427 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 06:06:56,458 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 06:06:56,458 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 06:06:56,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:06:56 BoogieIcfgContainer [2023-04-01 06:06:56,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 06:06:56,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 06:06:56,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 06:06:56,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 06:06:56,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:06:55" (1/3) ... [2023-04-01 06:06:56,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eae5c4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:06:56, skipping insertion in model container [2023-04-01 06:06:56,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:06:56" (2/3) ... [2023-04-01 06:06:56,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eae5c4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:06:56, skipping insertion in model container [2023-04-01 06:06:56,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:06:56" (3/3) ... [2023-04-01 06:06:56,466 INFO L112 eAbstractionObserver]: Analyzing ICFG id2_b2_o3.c [2023-04-01 06:06:56,480 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 06:06:56,480 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 06:06:56,521 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 06:06:56,539 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;@4da376e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 06:06:56,539 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 06:06:56,543 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 06:06:56,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 06:06:56,548 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:06:56,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:06:56,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:06:56,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:06:56,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1441261998, now seen corresponding path program 1 times [2023-04-01 06:06:56,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:06:56,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439188239] [2023-04-01 06:06:56,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:06:56,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:06:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:06:56,811 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 06:06:56,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:06:56,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439188239] [2023-04-01 06:06:56,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439188239] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:06:56,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:06:56,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 06:06:56,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277894617] [2023-04-01 06:06:56,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:06:56,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:06:56,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:06:56,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:06:56,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:06:56,855 INFO L87 Difference]: Start difference. First operand has 26 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 06:06:56,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:06:56,903 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2023-04-01 06:06:56,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:06:56,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2023-04-01 06:06:56,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:06:56,921 INFO L225 Difference]: With dead ends: 38 [2023-04-01 06:06:56,921 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 06:06:56,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 06:06:56,925 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:06:56,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 88 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:06:56,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 06:06:56,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-01 06:06:56,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 06:06:56,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-04-01 06:06:56,951 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 13 [2023-04-01 06:06:56,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:06:56,951 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-04-01 06:06:56,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 06:06:56,952 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-04-01 06:06:56,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 06:06:56,953 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:06:56,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:06:56,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 06:06:56,953 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:06:56,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:06:56,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1573748260, now seen corresponding path program 1 times [2023-04-01 06:06:56,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:06:56,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33782960] [2023-04-01 06:06:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:06:56,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:06:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:06:57,219 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 06:06:57,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:06:57,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33782960] [2023-04-01 06:06:57,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33782960] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:06:57,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 06:06:57,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-04-01 06:06:57,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793262152] [2023-04-01 06:06:57,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:06:57,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 06:06:57,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:06:57,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 06:06:57,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:06:57,222 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 06:06:57,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:06:57,256 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2023-04-01 06:06:57,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 06:06:57,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 19 [2023-04-01 06:06:57,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:06:57,257 INFO L225 Difference]: With dead ends: 33 [2023-04-01 06:06:57,257 INFO L226 Difference]: Without dead ends: 29 [2023-04-01 06:06:57,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 06:06:57,258 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:06:57,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:06:57,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-01 06:06:57,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2023-04-01 06:06:57,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 06:06:57,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-04-01 06:06:57,263 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2023-04-01 06:06:57,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:06:57,263 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-04-01 06:06:57,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 06:06:57,263 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-04-01 06:06:57,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 06:06:57,264 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 06:06:57,264 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 06:06:57,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 06:06:57,264 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 06:06:57,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 06:06:57,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1760594069, now seen corresponding path program 1 times [2023-04-01 06:06:57,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 06:06:57,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31449167] [2023-04-01 06:06:57,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:06:57,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 06:06:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:06:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 06:06:57,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 06:06:57,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31449167] [2023-04-01 06:06:57,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31449167] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 06:06:57,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552682502] [2023-04-01 06:06:57,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 06:06:57,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 06:06:57,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 06:06:57,489 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 06:06:57,532 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 06:06:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 06:06:57,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 06:06:57,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 06:06:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 06:06:57,640 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 06:06:57,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552682502] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 06:06:57,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 06:06:57,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-04-01 06:06:57,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302572482] [2023-04-01 06:06:57,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 06:06:57,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 06:06:57,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 06:06:57,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 06:06:57,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-04-01 06:06:57,642 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 06:06:57,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 06:06:57,659 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2023-04-01 06:06:57,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 06:06:57,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2023-04-01 06:06:57,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 06:06:57,660 INFO L225 Difference]: With dead ends: 27 [2023-04-01 06:06:57,660 INFO L226 Difference]: Without dead ends: 0 [2023-04-01 06:06:57,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-04-01 06:06:57,661 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 06:06:57,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 06:06:57,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-01 06:06:57,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-01 06:06:57,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-01 06:06:57,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-01 06:06:57,663 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2023-04-01 06:06:57,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 06:06:57,663 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-01 06:06:57,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 06:06:57,663 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-01 06:06:57,663 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-01 06:06:57,665 INFO L805 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 06:06:57,686 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 06:06:57,870 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 06:06:57,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-01 06:06:57,889 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2023-04-01 06:06:57,889 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 4) no Hoare annotation was computed. [2023-04-01 06:06:57,889 INFO L899 garLoopResultBuilder]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) no Hoare annotation was computed. [2023-04-01 06:06:57,889 INFO L899 garLoopResultBuilder]: For program point L27(line 27) no Hoare annotation was computed. [2023-04-01 06:06:57,889 INFO L899 garLoopResultBuilder]: For program point L26(lines 26 28) no Hoare annotation was computed. [2023-04-01 06:06:57,890 INFO L902 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2023-04-01 06:06:57,890 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 23 29) no Hoare annotation was computed. [2023-04-01 06:06:57,890 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2023-04-01 06:06:57,890 INFO L899 garLoopResultBuilder]: For program point L26-2(lines 23 29) no Hoare annotation was computed. [2023-04-01 06:06:57,890 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 23 29) the Hoare annotation is: true [2023-04-01 06:06:57,890 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-01 06:06:57,890 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-01 06:06:57,890 INFO L899 garLoopResultBuilder]: For program point L17(line 17) no Hoare annotation was computed. [2023-04-01 06:06:57,890 INFO L899 garLoopResultBuilder]: For program point L18-1(line 18) no Hoare annotation was computed. [2023-04-01 06:06:57,890 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 16 21) the Hoare annotation is: true [2023-04-01 06:06:57,890 INFO L899 garLoopResultBuilder]: For program point id2EXIT(lines 16 21) no Hoare annotation was computed. [2023-04-01 06:06:57,890 INFO L899 garLoopResultBuilder]: For program point id2FINAL(lines 16 21) no Hoare annotation was computed. [2023-04-01 06:06:57,891 INFO L902 garLoopResultBuilder]: At program point L18(line 18) the Hoare annotation is: true [2023-04-01 06:06:57,891 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-01 06:06:57,891 INFO L902 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2023-04-01 06:06:57,891 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-01 06:06:57,891 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-01 06:06:57,891 INFO L899 garLoopResultBuilder]: For program point idFINAL(lines 9 14) no Hoare annotation was computed. [2023-04-01 06:06:57,891 INFO L902 garLoopResultBuilder]: At program point L11(line 11) the Hoare annotation is: true [2023-04-01 06:06:57,891 INFO L899 garLoopResultBuilder]: For program point idEXIT(lines 9 14) no Hoare annotation was computed. [2023-04-01 06:06:57,891 INFO L899 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2023-04-01 06:06:57,891 INFO L899 garLoopResultBuilder]: For program point L11-1(line 11) no Hoare annotation was computed. [2023-04-01 06:06:57,892 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 9 14) the Hoare annotation is: true [2023-04-01 06:06:57,894 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-04-01 06:06:57,895 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 06:06:57,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 06:06:57 BoogieIcfgContainer [2023-04-01 06:06:57,898 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 06:06:57,898 INFO L158 Benchmark]: Toolchain (without parser) took 1912.76ms. Allocated memory is still 376.4MB. Free memory was 327.9MB in the beginning and 282.8MB in the end (delta: 45.1MB). Peak memory consumption was 46.0MB. Max. memory is 8.0GB. [2023-04-01 06:06:57,899 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 201.3MB. Free memory was 151.7MB in the beginning and 151.5MB in the end (delta: 184.6kB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 06:06:57,899 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.02ms. Allocated memory is still 376.4MB. Free memory was 327.9MB in the beginning and 317.8MB in the end (delta: 10.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-04-01 06:06:57,899 INFO L158 Benchmark]: Boogie Preprocessor took 32.83ms. Allocated memory is still 376.4MB. Free memory was 317.8MB in the beginning and 316.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-01 06:06:57,899 INFO L158 Benchmark]: RCFGBuilder took 264.47ms. Allocated memory is still 376.4MB. Free memory was 316.4MB in the beginning and 304.4MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-04-01 06:06:57,900 INFO L158 Benchmark]: TraceAbstraction took 1436.24ms. Allocated memory is still 376.4MB. Free memory was 303.8MB in the beginning and 282.8MB in the end (delta: 21.0MB). Peak memory consumption was 21.9MB. Max. memory is 8.0GB. [2023-04-01 06:06:57,902 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 201.3MB. Free memory was 151.7MB in the beginning and 151.5MB in the end (delta: 184.6kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 175.02ms. Allocated memory is still 376.4MB. Free memory was 327.9MB in the beginning and 317.8MB in the end (delta: 10.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.83ms. Allocated memory is still 376.4MB. Free memory was 317.8MB in the beginning and 316.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 264.47ms. Allocated memory is still 376.4MB. Free memory was 316.4MB in the beginning and 304.4MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 1436.24ms. Allocated memory is still 376.4MB. Free memory was 303.8MB in the beginning and 282.8MB in the end (delta: 21.0MB). Peak memory consumption was 21.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 27]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.4s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2 mSDsluCounter, 280 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 217 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 68 IncrementalHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 63 mSDtfsCounter, 68 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=2, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 9 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 82 NumberOfCodeBlocks, 82 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 188 SizeOfPredicates, 1 NumberOfNonLiveVariables, 84 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 6/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-04-01 06:06:57,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...