/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/afterrec-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:11:55,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:11:55,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:11:56,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:11:56,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:11:56,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:11:56,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:11:56,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:11:56,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:11:56,042 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:11:56,043 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:11:56,044 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:11:56,044 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:11:56,045 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:11:56,046 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:11:56,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:11:56,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:11:56,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:11:56,053 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:11:56,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:11:56,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:11:56,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:11:56,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:11:56,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:11:56,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:11:56,074 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:11:56,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:11:56,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:11:56,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:11:56,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:11:56,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:11:56,076 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:11:56,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:11:56,077 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:11:56,078 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:11:56,078 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:11:56,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:11:56,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:11:56,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:11:56,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:11:56,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:11:56,082 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 [2023-04-03 01:11:56,106 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:11:56,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:11:56,107 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:11:56,107 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:11:56,108 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:11:56,108 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:11:56,108 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:11:56,108 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:11:56,108 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:11:56,108 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:11:56,109 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:11:56,109 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:11:56,109 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:11:56,109 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:11:56,109 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:11:56,109 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:11:56,109 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:11:56,109 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:11:56,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:11:56,110 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:11:56,111 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:11:56,111 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:11:56,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:11:56,111 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:11:56,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:11:56,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:11:56,111 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:11:56,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:11:56,111 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:11:56,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:11:56,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:11:56,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:11:56,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:11:56,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:11:56,112 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:11:56,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:11:56,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:11:56,112 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:11:56,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:11:56,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:11:56,113 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:11:56,113 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:11:56,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:11:56,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:11:56,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:11:56,311 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:11:56,312 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:11:56,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/afterrec-1.c [2023-04-03 01:11:57,360 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:11:57,467 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:11:57,468 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec-1.c [2023-04-03 01:11:57,471 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94ac9ddcd/6f09efc737c6427381ecee05736c3b5e/FLAGacf44bf04 [2023-04-03 01:11:57,894 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94ac9ddcd/6f09efc737c6427381ecee05736c3b5e [2023-04-03 01:11:57,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:11:57,897 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:11:57,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:11:57,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:11:57,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:11:57,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:11:57" (1/1) ... [2023-04-03 01:11:57,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@236014c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:11:57, skipping insertion in model container [2023-04-03 01:11:57,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:11:57" (1/1) ... [2023-04-03 01:11:57,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:11:57,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:11:57,991 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/afterrec-1.c[318,331] [2023-04-03 01:11:57,994 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:11:57,999 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:11:58,006 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/afterrec-1.c[318,331] [2023-04-03 01:11:58,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:11:58,014 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:11:58,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:11:58 WrapperNode [2023-04-03 01:11:58,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:11:58,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:11:58,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:11:58,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:11:58,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:11:58" (1/1) ... [2023-04-03 01:11:58,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:11:58" (1/1) ... [2023-04-03 01:11:58,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:11:58" (1/1) ... [2023-04-03 01:11:58,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:11:58" (1/1) ... [2023-04-03 01:11:58,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:11:58" (1/1) ... [2023-04-03 01:11:58,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:11:58" (1/1) ... [2023-04-03 01:11:58,028 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:11:58" (1/1) ... [2023-04-03 01:11:58,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:11:58" (1/1) ... [2023-04-03 01:11:58,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:11:58,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:11:58,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:11:58,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:11:58,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:11:58" (1/1) ... [2023-04-03 01:11:58,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:11:58,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:11:58,050 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) [2023-04-03 01:11:58,052 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 [2023-04-03 01:11:58,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:11:58,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:11:58,110 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:11:58,110 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-04-03 01:11:58,110 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:11:58,110 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:11:58,110 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:11:58,110 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:11:58,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:11:58,110 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-04-03 01:11:58,110 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:11:58,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:11:58,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:11:58,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:11:58,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:11:58,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:11:58,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:11:58,165 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:11:58,167 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:11:58,281 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:11:58,291 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:11:58,291 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-03 01:11:58,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:11:58 BoogieIcfgContainer [2023-04-03 01:11:58,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:11:58,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:11:58,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:11:58,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:11:58,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:11:57" (1/3) ... [2023-04-03 01:11:58,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a39702e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:11:58, skipping insertion in model container [2023-04-03 01:11:58,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:11:58" (2/3) ... [2023-04-03 01:11:58,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a39702e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:11:58, skipping insertion in model container [2023-04-03 01:11:58,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:11:58" (3/3) ... [2023-04-03 01:11:58,306 INFO L112 eAbstractionObserver]: Analyzing ICFG afterrec-1.c [2023-04-03 01:11:58,319 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:11:58,319 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:11:58,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:11:58,372 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;@4bb572bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:11:58,373 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:11:58,376 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-03 01:11:58,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-03 01:11:58,382 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:11:58,383 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:11:58,383 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting fErr0ASSERT_VIOLATIONERROR_FUNCTION === [fErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:11:58,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:11:58,387 INFO L85 PathProgramCache]: Analyzing trace with hash -363255998, now seen corresponding path program 1 times [2023-04-03 01:11:58,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:11:58,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649459385] [2023-04-03 01:11:58,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:11:58,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:11:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:11:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:11:58,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:11:58,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649459385] [2023-04-03 01:11:58,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649459385] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:11:58,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371274687] [2023-04-03 01:11:58,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:11:58,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:11:58,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:11:58,705 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) [2023-04-03 01:11:58,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 01:11:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:11:58,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-03 01:11:58,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:11:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:11:58,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-03 01:11:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:11:58,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371274687] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-03 01:11:58,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [255900659] [2023-04-03 01:11:58,935 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-03 01:11:58,935 INFO L166 IcfgInterpreter]: Building call graph [2023-04-03 01:11:58,938 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-04-03 01:11:58,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-03 01:11:58,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2023-04-03 01:11:58,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781664477] [2023-04-03 01:11:58,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-03 01:11:58,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-03 01:11:58,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:11:58,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-03 01:11:58,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-04-03 01:11:58,959 INFO L87 Difference]: Start difference. First operand has 16 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 01:11:59,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:11:59,028 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2023-04-03 01:11:59,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-03 01:11:59,030 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2023-04-03 01:11:59,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:11:59,034 INFO L225 Difference]: With dead ends: 23 [2023-04-03 01:11:59,035 INFO L226 Difference]: Without dead ends: 15 [2023-04-03 01:11:59,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:11:59,041 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-03 01:11:59,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 26 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-03 01:11:59,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-04-03 01:11:59,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-04-03 01:11:59,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 8 states have internal predecessors, (8), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 01:11:59,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2023-04-03 01:11:59,065 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2023-04-03 01:11:59,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:11:59,066 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2023-04-03 01:11:59,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-03 01:11:59,066 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2023-04-03 01:11:59,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-03 01:11:59,066 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:11:59,066 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:11:59,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-03 01:11:59,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-03 01:11:59,269 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting fErr0ASSERT_VIOLATIONERROR_FUNCTION === [fErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:11:59,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:11:59,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1692421583, now seen corresponding path program 2 times [2023-04-03 01:11:59,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:11:59,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101982187] [2023-04-03 01:11:59,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:11:59,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:11:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-03 01:11:59,279 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-03 01:11:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-03 01:11:59,327 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-03 01:11:59,328 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-03 01:11:59,329 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location fErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-03 01:11:59,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 01:11:59,333 INFO L445 BasicCegarLoop]: Path program histogram: [2] [2023-04-03 01:11:59,335 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-03 01:11:59,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.04 01:11:59 BoogieIcfgContainer [2023-04-03 01:11:59,344 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-03 01:11:59,345 INFO L158 Benchmark]: Toolchain (without parser) took 1448.33ms. Allocated memory is still 215.0MB. Free memory was 173.2MB in the beginning and 170.8MB in the end (delta: 2.3MB). Peak memory consumption was 3.6MB. Max. memory is 8.0GB. [2023-04-03 01:11:59,345 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 215.0MB. Free memory is still 170.7MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-03 01:11:59,346 INFO L158 Benchmark]: CACSL2BoogieTranslator took 117.52ms. Allocated memory is still 215.0MB. Free memory was 173.2MB in the beginning and 163.6MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-04-03 01:11:59,346 INFO L158 Benchmark]: Boogie Preprocessor took 14.04ms. Allocated memory is still 215.0MB. Free memory was 163.6MB in the beginning and 162.3MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-03 01:11:59,346 INFO L158 Benchmark]: RCFGBuilder took 269.52ms. Allocated memory is still 215.0MB. Free memory was 162.3MB in the beginning and 152.5MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-03 01:11:59,346 INFO L158 Benchmark]: TraceAbstraction took 1043.78ms. Allocated memory is still 215.0MB. Free memory was 151.9MB in the beginning and 170.8MB in the end (delta: -19.0MB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-03 01:11:59,348 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 215.0MB. Free memory is still 170.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 117.52ms. Allocated memory is still 215.0MB. Free memory was 173.2MB in the beginning and 163.6MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 14.04ms. Allocated memory is still 215.0MB. Free memory was 163.6MB in the beginning and 162.3MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 269.52ms. Allocated memory is still 215.0MB. Free memory was 162.3MB in the beginning and 152.5MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 1043.78ms. Allocated memory is still 215.0MB. Free memory was 151.9MB in the beginning and 170.8MB in the end (delta: -19.0MB). There was no memory consumed. 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 - CounterExampleResult [Line: 9]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L13] CALL f(4) VAL [\old(n)=4] [L6] COND FALSE !(n<3) [L7] n-- VAL [\old(n)=4, n=3] [L8] CALL f(n) VAL [\old(n)=3] [L6] COND FALSE !(n<3) [L7] n-- VAL [\old(n)=3, n=2] [L8] CALL f(n) VAL [\old(n)=2] [L6] COND TRUE n<3 VAL [\old(n)=2, n=2] [L8] RET f(n) VAL [\old(n)=3, n=2] [L9] reach_error() VAL [\old(n)=3, n=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4 mSDsluCounter, 26 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 19 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 32 IncrementalHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 7 mSDtfsCounter, 32 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, InterpolantAutomatonStates: 7, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 76 SizeOfPredicates, 2 NumberOfNonLiveVariables, 57 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 3 InterpolantComputations, 0 PerfectInterpolantSequences, 0/6 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 RESULT: Ultimate proved your program to be incorrect! [2023-04-03 01:11:59,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...