/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci05.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 13:14:30,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 13:14:30,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 13:14:30,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 13:14:30,576 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 13:14:30,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 13:14:30,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 13:14:30,580 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 13:14:30,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 13:14:30,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 13:14:30,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 13:14:30,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 13:14:30,585 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 13:14:30,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 13:14:30,587 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 13:14:30,588 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 13:14:30,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 13:14:30,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 13:14:30,591 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 13:14:30,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 13:14:30,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 13:14:30,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 13:14:30,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 13:14:30,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 13:14:30,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 13:14:30,600 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 13:14:30,600 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 13:14:30,601 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 13:14:30,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 13:14:30,603 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 13:14:30,603 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 13:14:30,604 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 13:14:30,604 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 13:14:30,605 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 13:14:30,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 13:14:30,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 13:14:30,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 13:14:30,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 13:14:30,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 13:14:30,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 13:14:30,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 13:14:30,610 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 13:14:30,619 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 13:14:30,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 13:14:30,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 13:14:30,620 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 13:14:30,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 13:14:30,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 13:14:30,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 13:14:30,621 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 13:14:30,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 13:14:30,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 13:14:30,622 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 13:14:30,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 13:14:30,622 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 13:14:30,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 13:14:30,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 13:14:30,623 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 13:14:30,623 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 13:14:30,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 13:14:30,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 13:14:30,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 13:14:30,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 13:14:30,625 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 13:14:30,626 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-17 13:14:30,889 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 13:14:30,901 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 13:14:30,904 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 13:14:30,906 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 13:14:30,906 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 13:14:30,907 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci05.c [2020-07-17 13:14:30,983 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/906fa0ba4/08e4f5c058fa4e35a3aad0727d454e73/FLAGe7fa14c28 [2020-07-17 13:14:31,444 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 13:14:31,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci05.c [2020-07-17 13:14:31,451 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/906fa0ba4/08e4f5c058fa4e35a3aad0727d454e73/FLAGe7fa14c28 [2020-07-17 13:14:31,864 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/906fa0ba4/08e4f5c058fa4e35a3aad0727d454e73 [2020-07-17 13:14:31,874 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 13:14:31,877 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 13:14:31,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 13:14:31,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 13:14:31,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 13:14:31,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 01:14:31" (1/1) ... [2020-07-17 13:14:31,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a9c17cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:31, skipping insertion in model container [2020-07-17 13:14:31,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 01:14:31" (1/1) ... [2020-07-17 13:14:31,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 13:14:31,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 13:14:32,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 13:14:32,111 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 13:14:32,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 13:14:32,134 INFO L208 MainTranslator]: Completed translation [2020-07-17 13:14:32,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:32 WrapperNode [2020-07-17 13:14:32,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 13:14:32,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 13:14:32,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 13:14:32,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 13:14:32,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:32" (1/1) ... [2020-07-17 13:14:32,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:32" (1/1) ... [2020-07-17 13:14:32,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:32" (1/1) ... [2020-07-17 13:14:32,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:32" (1/1) ... [2020-07-17 13:14:32,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:32" (1/1) ... [2020-07-17 13:14:32,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:32" (1/1) ... [2020-07-17 13:14:32,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:32" (1/1) ... [2020-07-17 13:14:32,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 13:14:32,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 13:14:32,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 13:14:32,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 13:14:32,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:32" (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 [2020-07-17 13:14:32,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 13:14:32,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 13:14:32,302 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-17 13:14:32,302 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 13:14:32,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 13:14:32,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 13:14:32,302 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-17 13:14:32,302 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 13:14:32,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 13:14:32,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 13:14:32,472 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 13:14:32,472 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 13:14:32,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 01:14:32 BoogieIcfgContainer [2020-07-17 13:14:32,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 13:14:32,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 13:14:32,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 13:14:32,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 13:14:32,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 01:14:31" (1/3) ... [2020-07-17 13:14:32,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6155dbdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 01:14:32, skipping insertion in model container [2020-07-17 13:14:32,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:32" (2/3) ... [2020-07-17 13:14:32,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6155dbdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 01:14:32, skipping insertion in model container [2020-07-17 13:14:32,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 01:14:32" (3/3) ... [2020-07-17 13:14:32,482 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci05.c [2020-07-17 13:14:32,491 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 13:14:32,498 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 13:14:32,509 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 13:14:32,531 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 13:14:32,531 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 13:14:32,531 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-17 13:14:32,531 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 13:14:32,531 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 13:14:32,532 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 13:14:32,532 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 13:14:32,532 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 13:14:32,546 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-17 13:14:32,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-17 13:14:32,556 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:14:32,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 13:14:32,558 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:14:32,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:14:32,564 INFO L82 PathProgramCache]: Analyzing trace with hash -2064988448, now seen corresponding path program 1 times [2020-07-17 13:14:32,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:14:32,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927824076] [2020-07-17 13:14:32,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:14:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:32,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 13:14:32,776 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:14:32,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927824076] [2020-07-17 13:14:32,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 13:14:32,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 13:14:32,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315144850] [2020-07-17 13:14:32,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 13:14:32,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 13:14:32,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 13:14:32,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 13:14:32,804 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-17 13:14:33,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 13:14:33,044 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-07-17 13:14:33,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 13:14:33,047 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-07-17 13:14:33,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 13:14:33,062 INFO L225 Difference]: With dead ends: 48 [2020-07-17 13:14:33,063 INFO L226 Difference]: Without dead ends: 30 [2020-07-17 13:14:33,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 13:14:33,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-17 13:14:33,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-17 13:14:33,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-17 13:14:33,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-07-17 13:14:33,144 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2020-07-17 13:14:33,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 13:14:33,145 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-07-17 13:14:33,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 13:14:33,145 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-07-17 13:14:33,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-17 13:14:33,150 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:14:33,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 13:14:33,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 13:14:33,152 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:14:33,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:14:33,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1678486471, now seen corresponding path program 1 times [2020-07-17 13:14:33,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:14:33,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246239989] [2020-07-17 13:14:33,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:14:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 13:14:33,292 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:14:33,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246239989] [2020-07-17 13:14:33,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 13:14:33,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 13:14:33,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384212381] [2020-07-17 13:14:33,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 13:14:33,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 13:14:33,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 13:14:33,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 13:14:33,295 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-07-17 13:14:33,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 13:14:33,366 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-07-17 13:14:33,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 13:14:33,367 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-07-17 13:14:33,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 13:14:33,368 INFO L225 Difference]: With dead ends: 38 [2020-07-17 13:14:33,369 INFO L226 Difference]: Without dead ends: 32 [2020-07-17 13:14:33,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 13:14:33,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-17 13:14:33,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-17 13:14:33,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-17 13:14:33,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-07-17 13:14:33,381 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 19 [2020-07-17 13:14:33,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 13:14:33,382 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-07-17 13:14:33,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 13:14:33,382 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-07-17 13:14:33,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-17 13:14:33,384 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:14:33,384 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 13:14:33,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 13:14:33,385 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:14:33,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:14:33,385 INFO L82 PathProgramCache]: Analyzing trace with hash 961212118, now seen corresponding path program 1 times [2020-07-17 13:14:33,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:14:33,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633858275] [2020-07-17 13:14:33,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:14:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-17 13:14:33,694 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:14:33,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633858275] [2020-07-17 13:14:33,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 13:14:33,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-17 13:14:33,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303999732] [2020-07-17 13:14:33,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 13:14:33,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 13:14:33,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 13:14:33,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-07-17 13:14:33,697 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 13 states. [2020-07-17 13:14:33,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 13:14:33,887 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2020-07-17 13:14:33,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 13:14:33,887 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2020-07-17 13:14:33,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 13:14:33,888 INFO L225 Difference]: With dead ends: 53 [2020-07-17 13:14:33,888 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 13:14:33,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-07-17 13:14:33,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 13:14:33,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 13:14:33,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 13:14:33,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 13:14:33,891 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2020-07-17 13:14:33,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 13:14:33,891 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 13:14:33,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 13:14:33,892 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 13:14:33,892 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 13:14:33,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 13:14:33,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 13:14:34,215 INFO L264 CegarLoopResult]: At program point fibonacciFINAL(lines 14 22) the Hoare annotation is: (= fibonacci_~n |fibonacci_#in~n|) [2020-07-17 13:14:34,215 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-07-17 13:14:34,216 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (< 1 fibonacci_~n) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-17 13:14:34,216 INFO L264 CegarLoopResult]: At program point L20-1(line 20) the Hoare annotation is: (and (< 1 fibonacci_~n) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-17 13:14:34,216 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (<= |fibonacci_#in~n| 1) (< 0 fibonacci_~n) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-17 13:14:34,216 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (and (< 1 fibonacci_~n) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-17 13:14:34,216 INFO L264 CegarLoopResult]: At program point fibonacciEXIT(lines 14 22) the Hoare annotation is: (= fibonacci_~n |fibonacci_#in~n|) [2020-07-17 13:14:34,217 INFO L264 CegarLoopResult]: At program point L17(lines 17 21) the Hoare annotation is: (and (< 0 fibonacci_~n) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-17 13:14:34,217 INFO L264 CegarLoopResult]: At program point L20-3(line 20) the Hoare annotation is: (and (< 1 fibonacci_~n) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-17 13:14:34,217 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (<= |fibonacci_#in~n| 0) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-17 13:14:34,217 INFO L264 CegarLoopResult]: At program point L20-4(line 20) the Hoare annotation is: (and (< 1 fibonacci_~n) (<= |fibonacci_#t~ret1| 2147483647) (= fibonacci_~n |fibonacci_#in~n|) (<= 0 (+ |fibonacci_#t~ret1| 2147483648))) [2020-07-17 13:14:34,218 INFO L264 CegarLoopResult]: At program point L15(lines 15 21) the Hoare annotation is: (= fibonacci_~n |fibonacci_#in~n|) [2020-07-17 13:14:34,218 INFO L264 CegarLoopResult]: At program point L20-5(line 20) the Hoare annotation is: (and (< 1 fibonacci_~n) (<= |fibonacci_#t~ret1| 2147483647) (= |fibonacci_#res| (+ |fibonacci_#t~ret1| |fibonacci_#t~ret0|)) (<= 0 (+ |fibonacci_#t~ret1| 2147483648)) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-17 13:14:34,218 INFO L264 CegarLoopResult]: At program point L20-6(line 20) the Hoare annotation is: (and (< 1 fibonacci_~n) (<= |fibonacci_#t~ret1| 2147483647) (<= 0 (+ |fibonacci_#t~ret1| 2147483648)) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-17 13:14:34,218 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 13:14:34,218 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-07-17 13:14:34,219 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-07-17 13:14:34,219 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 13:14:34,219 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 13:14:34,219 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-07-17 13:14:34,219 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 31) the Hoare annotation is: false [2020-07-17 13:14:34,220 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (and (<= 8 main_~x~0) (<= 0 (+ main_~result~0 2147483648)) (< main_~result~0 34)) [2020-07-17 13:14:34,220 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 33) the Hoare annotation is: true [2020-07-17 13:14:34,220 INFO L271 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: true [2020-07-17 13:14:34,220 INFO L264 CegarLoopResult]: At program point L28(lines 28 32) the Hoare annotation is: (or (and (<= main_~result~0 2147483647) (<= 0 (+ main_~result~0 2147483648))) (<= main_~x~0 1)) [2020-07-17 13:14:34,220 INFO L271 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: true [2020-07-17 13:14:34,221 INFO L271 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: true [2020-07-17 13:14:34,221 INFO L271 CegarLoopResult]: At program point L27-1(line 27) the Hoare annotation is: true [2020-07-17 13:14:34,221 INFO L271 CegarLoopResult]: At program point L26-1(line 26) the Hoare annotation is: true [2020-07-17 13:14:34,221 INFO L264 CegarLoopResult]: At program point L27-2(line 27) the Hoare annotation is: (or (and (<= |main_#t~ret3| 2147483647) (<= 0 (+ |main_#t~ret3| 2147483648))) (<= main_~x~0 1)) [2020-07-17 13:14:34,221 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 25 33) the Hoare annotation is: true [2020-07-17 13:14:34,222 INFO L264 CegarLoopResult]: At program point L27-3(line 27) the Hoare annotation is: (or (and (<= |main_#t~ret3| 2147483647) (= |main_#t~ret3| main_~result~0) (<= 0 (+ |main_#t~ret3| 2147483648))) (<= main_~x~0 1)) [2020-07-17 13:14:34,222 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 25 33) the Hoare annotation is: true [2020-07-17 13:14:34,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 01:14:34 BoogieIcfgContainer [2020-07-17 13:14:34,239 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 13:14:34,241 INFO L168 Benchmark]: Toolchain (without parser) took 2365.13 ms. Allocated memory was 138.4 MB in the beginning and 235.4 MB in the end (delta: 97.0 MB). Free memory was 103.3 MB in the beginning and 149.0 MB in the end (delta: -45.8 MB). Peak memory consumption was 51.2 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:34,242 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 138.4 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 13:14:34,243 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.73 ms. Allocated memory is still 138.4 MB. Free memory was 102.8 MB in the beginning and 93.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:34,244 INFO L168 Benchmark]: Boogie Preprocessor took 24.38 ms. Allocated memory is still 138.4 MB. Free memory was 93.7 MB in the beginning and 92.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:34,245 INFO L168 Benchmark]: RCFGBuilder took 315.84 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 92.1 MB in the beginning and 168.7 MB in the end (delta: -76.6 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:34,246 INFO L168 Benchmark]: TraceAbstraction took 1762.27 ms. Allocated memory was 201.9 MB in the beginning and 235.4 MB in the end (delta: 33.6 MB). Free memory was 168.0 MB in the beginning and 149.0 MB in the end (delta: 19.0 MB). Peak memory consumption was 52.5 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:34,250 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 138.4 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 256.73 ms. Allocated memory is still 138.4 MB. Free memory was 102.8 MB in the beginning and 93.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.38 ms. Allocated memory is still 138.4 MB. Free memory was 93.7 MB in the beginning and 92.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 315.84 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 92.1 MB in the beginning and 168.7 MB in the end (delta: -76.6 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1762.27 ms. Allocated memory was 201.9 MB in the beginning and 235.4 MB in the end (delta: 33.6 MB). Free memory was 168.0 MB in the beginning and 149.0 MB in the end (delta: 19.0 MB). Peak memory consumption was 52.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 31]: 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: 14]: Procedure Contract for fibonacci Derived contract for procedure fibonacci: n == \old(n) - ProcedureContractResult [Line: 25]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 74 SDtfs, 55 SDslu, 221 SDs, 0 SdLazy, 166 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 33 LocationsWithAnnotation, 89 PreInvPairs, 153 NumberOfFragments, 181 HoareAnnotationTreeSize, 89 FomulaSimplifications, 262 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 33 FomulaSimplificationsInter, 108 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...