./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 601aa02d8073825ca8af8297fbd6b010f8103f99 ............................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 01:45:51,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 01:45:51,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 01:45:51,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 01:45:51,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 01:45:51,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 01:45:51,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 01:45:51,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 01:45:51,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 01:45:51,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 01:45:51,523 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 01:45:51,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 01:45:51,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 01:45:51,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 01:45:51,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 01:45:51,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 01:45:51,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 01:45:51,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 01:45:51,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 01:45:51,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 01:45:51,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 01:45:51,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 01:45:51,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 01:45:51,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 01:45:51,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 01:45:51,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 01:45:51,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 01:45:51,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 01:45:51,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 01:45:51,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 01:45:51,556 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 01:45:51,557 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 01:45:51,558 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 01:45:51,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 01:45:51,560 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 01:45:51,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 01:45:51,561 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 01:45:51,561 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 01:45:51,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 01:45:51,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 01:45:51,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 01:45:51,564 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 01:45:51,586 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 01:45:51,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 01:45:51,591 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 01:45:51,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 01:45:51,591 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 01:45:51,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 01:45:51,591 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 01:45:51,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 01:45:51,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 01:45:51,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 01:45:51,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 01:45:51,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 01:45:51,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 01:45:51,592 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 01:45:51,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 01:45:51,593 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 01:45:51,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 01:45:51,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 01:45:51,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 01:45:51,597 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 01:45:51,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 01:45:51,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:45:51,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 01:45:51,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 01:45:51,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 01:45:51,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 01:45:51,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 01:45:51,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 01:45:51,598 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 01:45:51,599 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 601aa02d8073825ca8af8297fbd6b010f8103f99 [2020-10-20 01:45:51,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 01:45:51,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 01:45:51,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 01:45:51,836 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 01:45:51,836 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 01:45:51,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c [2020-10-20 01:45:51,916 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b22412192/95d595af831d4c5c8a7e0b2e23e8de49/FLAGf1946d14a [2020-10-20 01:45:52,451 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 01:45:52,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec_2calls-1.c [2020-10-20 01:45:52,459 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b22412192/95d595af831d4c5c8a7e0b2e23e8de49/FLAGf1946d14a [2020-10-20 01:45:52,883 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b22412192/95d595af831d4c5c8a7e0b2e23e8de49 [2020-10-20 01:45:52,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 01:45:52,897 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 01:45:52,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 01:45:52,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 01:45:52,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 01:45:52,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:45:52" (1/1) ... [2020-10-20 01:45:52,906 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73e6bc6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:52, skipping insertion in model container [2020-10-20 01:45:52,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:45:52" (1/1) ... [2020-10-20 01:45:52,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 01:45:52,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 01:45:53,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:45:53,139 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 01:45:53,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:45:53,168 INFO L208 MainTranslator]: Completed translation [2020-10-20 01:45:53,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:53 WrapperNode [2020-10-20 01:45:53,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 01:45:53,170 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 01:45:53,170 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 01:45:53,170 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 01:45:53,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:53" (1/1) ... [2020-10-20 01:45:53,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:53" (1/1) ... [2020-10-20 01:45:53,200 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 01:45:53,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 01:45:53,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 01:45:53,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 01:45:53,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:53" (1/1) ... [2020-10-20 01:45:53,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:53" (1/1) ... [2020-10-20 01:45:53,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:53" (1/1) ... [2020-10-20 01:45:53,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:53" (1/1) ... [2020-10-20 01:45:53,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:53" (1/1) ... [2020-10-20 01:45:53,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:53" (1/1) ... [2020-10-20 01:45:53,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:53" (1/1) ... [2020-10-20 01:45:53,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 01:45:53,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 01:45:53,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 01:45:53,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 01:45:53,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:45:53,276 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-10-20 01:45:53,277 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-10-20 01:45:53,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 01:45:53,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 01:45:53,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 01:45:53,277 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2020-10-20 01:45:53,278 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2020-10-20 01:45:53,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 01:45:53,537 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 01:45:53,537 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-20 01:45:53,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:45:53 BoogieIcfgContainer [2020-10-20 01:45:53,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 01:45:53,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 01:45:53,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 01:45:53,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 01:45:53,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 01:45:52" (1/3) ... [2020-10-20 01:45:53,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@601310f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:45:53, skipping insertion in model container [2020-10-20 01:45:53,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:45:53" (2/3) ... [2020-10-20 01:45:53,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@601310f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:45:53, skipping insertion in model container [2020-10-20 01:45:53,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:45:53" (3/3) ... [2020-10-20 01:45:53,568 INFO L111 eAbstractionObserver]: Analyzing ICFG afterrec_2calls-1.c [2020-10-20 01:45:53,581 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 01:45:53,588 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-20 01:45:53,611 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-20 01:45:53,635 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 01:45:53,636 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 01:45:53,636 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 01:45:53,636 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 01:45:53,636 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 01:45:53,636 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 01:45:53,636 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 01:45:53,636 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 01:45:53,654 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-20 01:45:53,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 01:45:53,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:45:53,660 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:45:53,661 INFO L429 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:45:53,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:45:53,666 INFO L82 PathProgramCache]: Analyzing trace with hash -2066358075, now seen corresponding path program 1 times [2020-10-20 01:45:53,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:45:53,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100001171] [2020-10-20 01:45:53,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:45:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:53,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-20 01:45:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:45:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:45:53,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100001171] [2020-10-20 01:45:53,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:45:53,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-20 01:45:53,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241388839] [2020-10-20 01:45:53,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 01:45:53,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:45:53,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 01:45:53,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-20 01:45:53,961 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 7 states. [2020-10-20 01:45:54,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:45:54,077 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-20 01:45:54,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 01:45:54,079 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-20 01:45:54,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:45:54,090 INFO L225 Difference]: With dead ends: 33 [2020-10-20 01:45:54,090 INFO L226 Difference]: Without dead ends: 20 [2020-10-20 01:45:54,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-20 01:45:54,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-20 01:45:54,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-20 01:45:54,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-20 01:45:54,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-20 01:45:54,152 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2020-10-20 01:45:54,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:45:54,153 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-20 01:45:54,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 01:45:54,153 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-20 01:45:54,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 01:45:54,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:45:54,154 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:45:54,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 01:45:54,155 INFO L429 AbstractCegarLoop]: === Iteration 2 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:45:54,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:45:54,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1893830556, now seen corresponding path program 1 times [2020-10-20 01:45:54,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:45:54,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433616940] [2020-10-20 01:45:54,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:45:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 01:45:54,182 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 01:45:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 01:45:54,214 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 01:45:54,250 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 01:45:54,251 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 01:45:54,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 01:45:54,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 01:45:54 BoogieIcfgContainer [2020-10-20 01:45:54,301 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 01:45:54,301 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 01:45:54,301 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 01:45:54,302 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 01:45:54,302 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:45:53" (3/4) ... [2020-10-20 01:45:54,305 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 01:45:54,383 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 01:45:54,383 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 01:45:54,386 INFO L168 Benchmark]: Toolchain (without parser) took 1496.12 ms. Allocated memory was 40.9 MB in the beginning and 46.1 MB in the end (delta: 5.2 MB). Free memory was 18.6 MB in the beginning and 21.5 MB in the end (delta: -2.9 MB). Peak memory consumption was 2.4 MB. Max. memory is 14.3 GB. [2020-10-20 01:45:54,387 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 30.9 MB. Free memory was 7.2 MB in the beginning and 7.1 MB in the end (delta: 45.7 kB). Peak memory consumption was 45.7 kB. Max. memory is 14.3 GB. [2020-10-20 01:45:54,389 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.25 ms. Allocated memory was 40.9 MB in the beginning and 41.4 MB in the end (delta: 524.3 kB). Free memory was 17.8 MB in the beginning and 20.8 MB in the end (delta: -2.9 MB). Peak memory consumption was 9.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:45:54,390 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.02 ms. Allocated memory is still 41.4 MB. Free memory was 20.6 MB in the beginning and 19.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 01:45:54,391 INFO L168 Benchmark]: Boogie Preprocessor took 15.26 ms. Allocated memory is still 41.4 MB. Free memory was 19.0 MB in the beginning and 17.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. [2020-10-20 01:45:54,391 INFO L168 Benchmark]: RCFGBuilder took 325.04 ms. Allocated memory was 41.4 MB in the beginning and 43.0 MB in the end (delta: 1.6 MB). Free memory was 17.9 MB in the beginning and 22.8 MB in the end (delta: -4.9 MB). Peak memory consumption was 9.3 MB. Max. memory is 14.3 GB. [2020-10-20 01:45:54,392 INFO L168 Benchmark]: TraceAbstraction took 748.66 ms. Allocated memory was 43.0 MB in the beginning and 46.1 MB in the end (delta: 3.1 MB). Free memory was 22.3 MB in the beginning and 23.9 MB in the end (delta: -1.6 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-20 01:45:54,393 INFO L168 Benchmark]: Witness Printer took 82.17 ms. Allocated memory is still 46.1 MB. Free memory was 23.9 MB in the beginning and 21.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 14.3 GB. [2020-10-20 01:45:54,398 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 30.9 MB. Free memory was 7.2 MB in the beginning and 7.1 MB in the end (delta: 45.7 kB). Peak memory consumption was 45.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 271.25 ms. Allocated memory was 40.9 MB in the beginning and 41.4 MB in the end (delta: 524.3 kB). Free memory was 17.8 MB in the beginning and 20.8 MB in the end (delta: -2.9 MB). Peak memory consumption was 9.2 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 30.02 ms. Allocated memory is still 41.4 MB. Free memory was 20.6 MB in the beginning and 19.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 15.26 ms. Allocated memory is still 41.4 MB. Free memory was 19.0 MB in the beginning and 17.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 325.04 ms. Allocated memory was 41.4 MB in the beginning and 43.0 MB in the end (delta: 1.6 MB). Free memory was 17.9 MB in the beginning and 22.8 MB in the end (delta: -4.9 MB). Peak memory consumption was 9.3 MB. Max. memory is 14.3 GB. * TraceAbstraction took 748.66 ms. Allocated memory was 43.0 MB in the beginning and 46.1 MB in the end (delta: 3.1 MB). Free memory was 22.3 MB in the beginning and 23.9 MB in the end (delta: -1.6 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * Witness Printer took 82.17 ms. Allocated memory is still 46.1 MB. Free memory was 23.9 MB in the beginning and 21.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] CALL f(4) [L9] COND FALSE !(n<3) [L10] n-- [L11] CALL f2(n) [L16] COND FALSE !(n<3) [L17] n-- [L18] CALL f(n) [L9] COND TRUE n<3 [L18] RET f(n) [L3] __assert_fail("0", "afterrec_2calls-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 3 SDslu, 51 SDs, 0 SdLazy, 33 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, 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, 0.1s InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 220 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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! Received shutdown request...