/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/afterrec-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-8fc6572 [2020-07-11 00:34:58,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-11 00:34:58,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-11 00:34:58,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-11 00:34:58,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-11 00:34:58,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-11 00:34:58,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-11 00:34:58,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-11 00:34:58,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-11 00:34:58,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-11 00:34:58,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-11 00:34:58,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-11 00:34:58,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-11 00:34:58,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-11 00:34:58,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-11 00:34:58,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-11 00:34:58,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-11 00:34:58,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-11 00:34:58,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-11 00:34:58,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-11 00:34:58,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-11 00:34:58,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-11 00:34:58,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-11 00:34:58,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-11 00:34:58,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-11 00:34:58,455 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-11 00:34:58,456 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-11 00:34:58,457 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-11 00:34:58,457 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-11 00:34:58,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-11 00:34:58,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-11 00:34:58,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-11 00:34:58,463 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-11 00:34:58,464 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-11 00:34:58,465 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-11 00:34:58,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-11 00:34:58,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-11 00:34:58,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-11 00:34:58,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-11 00:34:58,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-11 00:34:58,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-11 00:34:58,474 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-11 00:34:58,493 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-11 00:34:58,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-11 00:34:58,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-11 00:34:58,496 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-11 00:34:58,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-11 00:34:58,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-11 00:34:58,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-11 00:34:58,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-11 00:34:58,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-11 00:34:58,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-11 00:34:58,499 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-11 00:34:58,499 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-11 00:34:58,499 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-11 00:34:58,500 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-11 00:34:58,500 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-11 00:34:58,500 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-11 00:34:58,500 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-11 00:34:58,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-11 00:34:58,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-11 00:34:58,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-11 00:34:58,501 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-11 00:34:58,501 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-11 00:34:58,502 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-07-11 00:34:58,759 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-11 00:34:58,772 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-11 00:34:58,775 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-11 00:34:58,777 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-11 00:34:58,777 INFO L275 PluginConnector]: CDTParser initialized [2020-07-11 00:34:58,778 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec-2.c [2020-07-11 00:34:58,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1b663cf4/742ec759c4c546a690d0507c0094b332/FLAG33063ea6d [2020-07-11 00:34:59,308 INFO L306 CDTParser]: Found 1 translation units. [2020-07-11 00:34:59,309 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec-2.c [2020-07-11 00:34:59,315 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1b663cf4/742ec759c4c546a690d0507c0094b332/FLAG33063ea6d [2020-07-11 00:34:59,329 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1b663cf4/742ec759c4c546a690d0507c0094b332 [2020-07-11 00:34:59,337 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-11 00:34:59,339 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-11 00:34:59,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-11 00:34:59,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-11 00:34:59,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-11 00:34:59,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 12:34:59" (1/1) ... [2020-07-11 00:34:59,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cbb30b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 12:34:59, skipping insertion in model container [2020-07-11 00:34:59,350 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 12:34:59" (1/1) ... [2020-07-11 00:34:59,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-11 00:34:59,374 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-11 00:34:59,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-11 00:34:59,547 INFO L203 MainTranslator]: Completed pre-run [2020-07-11 00:34:59,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-11 00:34:59,577 INFO L208 MainTranslator]: Completed translation [2020-07-11 00:34:59,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 12:34:59 WrapperNode [2020-07-11 00:34:59,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-11 00:34:59,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-11 00:34:59,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-11 00:34:59,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-11 00:34:59,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 12:34:59" (1/1) ... [2020-07-11 00:34:59,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 12:34:59" (1/1) ... [2020-07-11 00:34:59,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 12:34:59" (1/1) ... [2020-07-11 00:34:59,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 12:34:59" (1/1) ... [2020-07-11 00:34:59,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 12:34:59" (1/1) ... [2020-07-11 00:34:59,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 12:34:59" (1/1) ... [2020-07-11 00:34:59,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 12:34:59" (1/1) ... [2020-07-11 00:34:59,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-11 00:34:59,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-11 00:34:59,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-11 00:34:59,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-11 00:34:59,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 12:34:59" (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 [2020-07-11 00:34:59,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-11 00:34:59,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-11 00:34:59,761 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-07-11 00:34:59,762 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-11 00:34:59,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-11 00:34:59,762 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-07-11 00:34:59,762 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-11 00:34:59,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-11 00:34:59,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-11 00:34:59,942 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-11 00:34:59,943 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-11 00:34:59,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 12:34:59 BoogieIcfgContainer [2020-07-11 00:34:59,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-11 00:34:59,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-11 00:34:59,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-11 00:34:59,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-11 00:34:59,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 12:34:59" (1/3) ... [2020-07-11 00:34:59,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@570d3747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 12:34:59, skipping insertion in model container [2020-07-11 00:34:59,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 12:34:59" (2/3) ... [2020-07-11 00:34:59,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@570d3747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 12:34:59, skipping insertion in model container [2020-07-11 00:34:59,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 12:34:59" (3/3) ... [2020-07-11 00:34:59,956 INFO L109 eAbstractionObserver]: Analyzing ICFG afterrec-2.c [2020-07-11 00:34:59,968 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-11 00:34:59,976 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-11 00:34:59,992 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-11 00:35:00,025 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-11 00:35:00,025 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-11 00:35:00,026 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-11 00:35:00,026 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-11 00:35:00,026 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-11 00:35:00,026 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-11 00:35:00,027 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-11 00:35:00,027 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-11 00:35:00,046 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-07-11 00:35:00,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-11 00:35:00,057 INFO L414 BasicCegarLoop]: Found error trace [2020-07-11 00:35:00,059 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-11 00:35:00,059 INFO L427 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-11 00:35:00,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-11 00:35:00,070 INFO L82 PathProgramCache]: Analyzing trace with hash -611063963, now seen corresponding path program 1 times [2020-07-11 00:35:00,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-11 00:35:00,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773673478] [2020-07-11 00:35:00,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-11 00:35:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-11 00:35:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-11 00:35:00,320 INFO L280 TraceCheckUtils]: 0: Hoare triple {22#true} assume true; {22#true} is VALID [2020-07-11 00:35:00,320 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {22#true} {22#true} #22#return; {22#true} is VALID [2020-07-11 00:35:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-11 00:35:00,333 INFO L280 TraceCheckUtils]: 0: Hoare triple {22#true} ~n := #in~n; {22#true} is VALID [2020-07-11 00:35:00,333 INFO L280 TraceCheckUtils]: 1: Hoare triple {22#true} assume ~n < 3; {22#true} is VALID [2020-07-11 00:35:00,333 INFO L280 TraceCheckUtils]: 2: Hoare triple {22#true} assume true; {22#true} is VALID [2020-07-11 00:35:00,334 INFO L275 TraceCheckUtils]: 3: Hoare quadruple {22#true} {23#false} #20#return; {23#false} is VALID [2020-07-11 00:35:00,334 INFO L263 TraceCheckUtils]: 0: Hoare triple {22#true} call ULTIMATE.init(); {22#true} is VALID [2020-07-11 00:35:00,335 INFO L280 TraceCheckUtils]: 1: Hoare triple {22#true} assume true; {22#true} is VALID [2020-07-11 00:35:00,335 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {22#true} {22#true} #22#return; {22#true} is VALID [2020-07-11 00:35:00,335 INFO L263 TraceCheckUtils]: 3: Hoare triple {22#true} call #t~ret1 := main(); {22#true} is VALID [2020-07-11 00:35:00,337 INFO L263 TraceCheckUtils]: 4: Hoare triple {22#true} call f(2); {26#(<= |f_#in~n| 2)} is VALID [2020-07-11 00:35:00,345 INFO L280 TraceCheckUtils]: 5: Hoare triple {26#(<= |f_#in~n| 2)} ~n := #in~n; {27#(<= f_~n 2)} is VALID [2020-07-11 00:35:00,347 INFO L280 TraceCheckUtils]: 6: Hoare triple {27#(<= f_~n 2)} assume !(~n < 3); {23#false} is VALID [2020-07-11 00:35:00,347 INFO L280 TraceCheckUtils]: 7: Hoare triple {23#false} #t~post0 := ~n; {23#false} is VALID [2020-07-11 00:35:00,348 INFO L280 TraceCheckUtils]: 8: Hoare triple {23#false} ~n := #t~post0 - 1; {23#false} is VALID [2020-07-11 00:35:00,348 INFO L280 TraceCheckUtils]: 9: Hoare triple {23#false} havoc #t~post0; {23#false} is VALID [2020-07-11 00:35:00,348 INFO L263 TraceCheckUtils]: 10: Hoare triple {23#false} call f(~n); {22#true} is VALID [2020-07-11 00:35:00,349 INFO L280 TraceCheckUtils]: 11: Hoare triple {22#true} ~n := #in~n; {22#true} is VALID [2020-07-11 00:35:00,349 INFO L280 TraceCheckUtils]: 12: Hoare triple {22#true} assume ~n < 3; {22#true} is VALID [2020-07-11 00:35:00,349 INFO L280 TraceCheckUtils]: 13: Hoare triple {22#true} assume true; {22#true} is VALID [2020-07-11 00:35:00,350 INFO L275 TraceCheckUtils]: 14: Hoare quadruple {22#true} {23#false} #20#return; {23#false} is VALID [2020-07-11 00:35:00,350 INFO L280 TraceCheckUtils]: 15: Hoare triple {23#false} assume !false; {23#false} is VALID [2020-07-11 00:35:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-11 00:35:00,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773673478] [2020-07-11 00:35:00,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-11 00:35:00,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-07-11 00:35:00,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682626589] [2020-07-11 00:35:00,367 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-11 00:35:00,371 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-11 00:35:00,376 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states. [2020-07-11 00:35:00,439 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 16 edges. 16 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-11 00:35:00,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-11 00:35:00,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-11 00:35:00,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-11 00:35:00,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-11 00:35:00,458 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 4 states. [2020-07-11 00:35:00,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-11 00:35:00,653 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-07-11 00:35:00,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-11 00:35:00,654 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-11 00:35:00,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-11 00:35:00,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-07-11 00:35:00,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2020-07-11 00:35:00,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-07-11 00:35:00,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2020-07-11 00:35:00,686 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states and 28 transitions. [2020-07-11 00:35:00,753 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 28 edges. 28 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-11 00:35:00,764 INFO L225 Difference]: With dead ends: 27 [2020-07-11 00:35:00,764 INFO L226 Difference]: Without dead ends: 0 [2020-07-11 00:35:00,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-11 00:35:00,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-11 00:35:00,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-11 00:35:00,802 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-11 00:35:00,802 INFO L82 GeneralOperation]: Start isEquivalent. First operand 0 states. Second operand 0 states. [2020-07-11 00:35:00,803 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand 0 states. [2020-07-11 00:35:00,804 INFO L87 Difference]: Start difference. First operand 0 states. Second operand 0 states. [2020-07-11 00:35:00,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-11 00:35:00,805 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-07-11 00:35:00,806 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-11 00:35:00,806 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-11 00:35:00,806 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-11 00:35:00,806 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand 0 states. [2020-07-11 00:35:00,807 INFO L87 Difference]: Start difference. First operand 0 states. Second operand 0 states. [2020-07-11 00:35:00,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-11 00:35:00,807 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-07-11 00:35:00,808 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-11 00:35:00,809 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-11 00:35:00,809 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-11 00:35:00,809 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-11 00:35:00,809 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-11 00:35:00,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-11 00:35:00,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-11 00:35:00,813 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-07-11 00:35:00,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-11 00:35:00,813 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-11 00:35:00,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-11 00:35:00,814 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 0 states and 0 transitions. [2020-07-11 00:35:00,814 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-11 00:35:00,814 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-11 00:35:00,815 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-11 00:35:00,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-11 00:35:00,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-11 00:35:00,996 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-11 00:35:00,996 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-07-11 00:35:00,997 INFO L264 CegarLoopResult]: At program point fErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (not (<= |f_#in~n| 2)) [2020-07-11 00:35:00,997 INFO L264 CegarLoopResult]: At program point fFINAL(lines 3 8) the Hoare annotation is: (or (<= f_~n 2) (not (<= |f_#in~n| 2))) [2020-07-11 00:35:00,998 INFO L264 CegarLoopResult]: At program point fEXIT(lines 3 8) the Hoare annotation is: (or (<= f_~n 2) (not (<= |f_#in~n| 2))) [2020-07-11 00:35:00,998 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (not (<= |f_#in~n| 2)) [2020-07-11 00:35:00,998 INFO L271 CegarLoopResult]: At program point fENTRY(lines 3 8) the Hoare annotation is: true [2020-07-11 00:35:00,998 INFO L264 CegarLoopResult]: At program point L5(line 5) the Hoare annotation is: (not (<= |f_#in~n| 2)) [2020-07-11 00:35:00,999 INFO L264 CegarLoopResult]: At program point L6-1(lines 3 8) the Hoare annotation is: (not (<= |f_#in~n| 2)) [2020-07-11 00:35:00,999 INFO L264 CegarLoopResult]: At program point L4(line 4) the Hoare annotation is: (or (<= f_~n 2) (not (<= |f_#in~n| 2))) [2020-07-11 00:35:00,999 INFO L264 CegarLoopResult]: At program point L5-1(line 5) the Hoare annotation is: (not (<= |f_#in~n| 2)) [2020-07-11 00:35:01,000 INFO L264 CegarLoopResult]: At program point L5-2(line 5) the Hoare annotation is: (not (<= |f_#in~n| 2)) [2020-07-11 00:35:01,000 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-07-11 00:35:01,000 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-11 00:35:01,000 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-11 00:35:01,001 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-07-11 00:35:01,001 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 12) the Hoare annotation is: true [2020-07-11 00:35:01,001 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 10 12) the Hoare annotation is: true [2020-07-11 00:35:01,001 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 10 12) the Hoare annotation is: true [2020-07-11 00:35:01,013 INFO L163 areAnnotationChecker]: CFG has 20 edges. 20 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2020-07-11 00:35:01,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.07 12:35:01 BoogieIcfgContainer [2020-07-11 00:35:01,027 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-11 00:35:01,030 INFO L168 Benchmark]: Toolchain (without parser) took 1690.79 ms. Allocated memory was 138.4 MB in the beginning and 205.0 MB in the end (delta: 66.6 MB). Free memory was 101.9 MB in the beginning and 106.1 MB in the end (delta: -4.2 MB). Peak memory consumption was 62.4 MB. Max. memory is 7.1 GB. [2020-07-11 00:35:01,032 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 138.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-11 00:35:01,033 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.29 ms. Allocated memory is still 138.4 MB. Free memory was 101.5 MB in the beginning and 92.6 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. [2020-07-11 00:35:01,034 INFO L168 Benchmark]: Boogie Preprocessor took 29.36 ms. Allocated memory is still 138.4 MB. Free memory was 92.6 MB in the beginning and 91.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-11 00:35:01,035 INFO L168 Benchmark]: RCFGBuilder took 338.98 ms. Allocated memory was 138.4 MB in the beginning and 205.0 MB in the end (delta: 66.6 MB). Free memory was 91.2 MB in the beginning and 171.7 MB in the end (delta: -80.5 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-11 00:35:01,036 INFO L168 Benchmark]: TraceAbstraction took 1078.82 ms. Allocated memory is still 205.0 MB. Free memory was 171.1 MB in the beginning and 106.1 MB in the end (delta: 65.0 MB). Peak memory consumption was 65.0 MB. Max. memory is 7.1 GB. [2020-07-11 00:35:01,040 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 138.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 237.29 ms. Allocated memory is still 138.4 MB. Free memory was 101.5 MB in the beginning and 92.6 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.36 ms. Allocated memory is still 138.4 MB. Free memory was 92.6 MB in the beginning and 91.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 338.98 ms. Allocated memory was 138.4 MB in the beginning and 205.0 MB in the end (delta: 66.6 MB). Free memory was 91.2 MB in the beginning and 171.7 MB in the end (delta: -80.5 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1078.82 ms. Allocated memory is still 205.0 MB. Free memory was 171.1 MB in the beginning and 106.1 MB in the end (delta: 65.0 MB). Peak memory consumption was 65.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 3]: Procedure Contract for f Derived contract for procedure f: n <= 2 || !(\old(n) <= 2) - ProcedureContractResult [Line: 10]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.7s, OverallIterations: 1, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 SDtfs, 5 SDslu, 15 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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: 0.0s HoareAnnotationTime, 19 LocationsWithAnnotation, 29 PreInvPairs, 35 NumberOfFragments, 58 HoareAnnotationTreeSize, 29 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 19 FomulaSimplificationsInter, 12 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 16 NumberOfCodeBlocks, 16 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 285 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 0 PerfectInterpolantSequences, 0/2 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 correct! Received shutdown request...